Category: thiazolidine

Kopeikin, Zoia published the artcileOn the mechanism of CFTR inhibition by a thiazolidinone derivative, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Journal of General Physiology (2010), 136(6), 659-671, database is CAplus and MEDLINE.

The effects of a thiazolidinone derivative, 3-[(3-trifluoromethyl)phenyl]-5-[(4-carboxyphenyl)methylene]-2-thioxo-4-thiazolidinone (or CFTRinh-172), on cystic fibrosis transmembrane conductance regulator (CFTR) gating were studied in excised inside-out membrane patches from Chinese hamster ovary cells transiently expressing wild-type and mutant CFTR. We found that the application of CFTRinh-172 results in an increase of the mean closed time and a decrease of the mean open time of the channel. A hyperbolic relationship between the closing rate and [CFTRinh-172] suggests that CFTRinh-172 does not act as a simple pore blocker. Interestingly, the potency of inhibition increases as the open time of the channel is increased with an IC50 in the low nanomolar range for CFTR channels locked in an open state for tens of seconds. Our studies also provide evidence that CFTRinh-172 can bind to both the open state and the closed state. However, at least one addnl. step, presumably reflecting inhibitor-induced conformational changes, is required to shut down the conductance after the binding of the inhibitor to the channel. Using the hydrolysis-deficient mutant E1371S as a tool as the closing rate of this mutant is dramatically decreased, we found that CFTRinh-172-dependent inhibition of CFTR channel gating, in two aspects, mimics the inactivation of voltage-dependent cation channels. First, similar to the recovery from inactivation in voltage-gated channels, once CFTR is inhibited by CFTRinh-172, reopening of the channel can be seen upon removal of the inhibitor in the absence of ATP. Second, ATP induced a biphasic current response on inhibitor-bound closed channels as if the ATP-opened channels “inactivate” despite a continuous presence of ATP. A simplified six-state kinetic scheme can well describe our data, at least qual. Several possible structural mechanisms for the effects of CFTRinh-172 will be discussed.

Journal of General Physiology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Moniz, Sonia published the artcileHGF Stimulation of Rac1 Signaling Enhances Pharmacological Correction of the Most Prevalent Cystic Fibrosis Mutant F508del-CFTR, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is ACS Chemical Biology (2013), 8(2), 432-442, database is CAplus and MEDLINE.

Cystic fibrosis (CF), a major life-limiting genetic disease leading to severe respiratory symptoms, is caused by mutations in CF transmembrane conductance regulator (CFTR), a chloride (Cl^–) channel expressed at the apical membrane of epithelial cells. Absence of functional CFTR from the surface of respiratory cells reduces mucociliary clearance, promoting airways obstruction, chronic infection, and ultimately lung failure. The most frequent mutation, F508del, causes the channel to misfold, triggering its premature degradation and preventing it from reaching the cell surface. Recently, novel small-mol. correctors rescuing plasma membrane localization of F508del-CFTR underwent clin. trials but with limited success. Plausibly, this may be due to the mutant intrinsic plasma membrane (PM) instability. Herein, we show that restoration of F508del-CFTR PM localization by correctors can be dramatically improved through a novel pathway involving stimulation of signaling by the endogenous small GTPase Rac1 via hepatocyte growth factor (HGF). We first show that CFTR anchors to apical actin cytoskeleton (via Ezrin) upon activation of Rac1 signaling through PIP5K and Arp2/3. We then found that such anchoring retains pharmacol. rescued F508del-CFTR at the cell surface, boosting functional restoration by correctors up to 30% of wild-type channel levels in human airway epithelial cells. Our findings reveal that surface anchoring and retention is a major target pathway for CF pharmacotherapy, namely, to achieve maximal restoration of F508del-CFTR in patients in combination with correctors. Moreover, this approach may also translate to other disorders caused by trafficking-deficient surface proteins.

ACS Chemical Biology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Stahl, Maximilian published the artcileDivergent CFTR orthologs respond differently to the channel inhibitors CFTR_inh-172, glibenclamide, and GlyH-101, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is American Journal of Physiology (2012), 302(1), C67-C76, database is CAplus and MEDLINE.

Comparison of diverse orthologs is a powerful tool to study the structure and function of channel proteins. We investigated the response of human, killifish, pig, and shark cystic fibrosis transmembrane conductance regulator (CFTR) to specific inhibitors of the channel: CFTR_inh-172, glibenclamide, and GlyH-101. In three systems, including organ perfusion of the shark rectal gland, primary cultures of shark rectal gland tubules, and expression studies of each ortholog in cRNA microinjected Xenopus laevis oocytes, we observed fundamental differences in the sensitivity to inhibition by these channel blockers. In organ perfusion studies, shark CFTR was insensitive to inhibition by CFTR_inh-172. This insensitivity was also seen in short-circuit current experiments with cultured rectal gland tubular epithelial cells (maximum inhibition 4 ± 1.3%). In oocyte expression studies, shark CFTR was again insensitive to CFTR_inh-172 (maximum inhibition 10.3 ± 2.5% at 25 μM), pig CFTR was insensitive to glibenclamide (maximum inhibition 18.4 ± 4.4% at 250 μM), and all orthologs were sensitive to GlyH-101. The amino acid residues considered responsible by previous site-directed mutagenesis for binding of the three inhibitors are conserved in the four CFTR isoforms studied. These experiments demonstrate a profound difference in the sensitivity of different orthologs of CFTR proteins to inhibition by CFTR blockers that cannot be explained by mutagenesis of single amino acids. We believe that the potency of the inhibitors CFTR_inh-172, glibenclamide, and GlyH-101 on the CFTR chloride channel protein is likely dictated by the local environment and the three-dimensional structure of addnl. residues that form the vestibules, the chloride pore, and regulatory regions of the channel.

American Journal of Physiology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C9H6BrNO, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Melis, N. published the artcileRevisiting CFTR inhibition: a comparative study of CFTR_inh-172 and GlyH-101 inhibitors, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is British Journal of Pharmacology (2014), 171(15), 3716-3727, database is CAplus and MEDLINE.

Background and Purpose : For decades, inhibitors of the cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel have been used as tools to investigate the role and function of CFTR conductance in cystic fibrosis research. In the early 2000s, two new and potent inhibitors of CFTR, CFTR_inh-172 and GlyH-101, were described and are now widely used to inhibit specifically CFTR. However, despite some evidence, the effects of both drugs on other types of Cl^–-conductance have been overlooked. In this context, we explore the specificity and the cellular toxicity of both inhibitors in CFTR-expressing and non-CFTR-expressing cells. Exptl. Approach : Using patch-clamp technique, we tested the effects of CFTR_inh-172 and GlyH-101 inhibitors on three distinct types of Cl^– currents: the CFTR-like conductance, the volume-sensitive outwardly rectifying Cl^– conductance (VSORC) and finally the Ca²⁺-dependent Cl^– conductance (CaCC). We also explored the effect of both inhibitors on cell viability using live/dead and cell proliferation assays in two different cell lines. Key Results : We confirmed that these two compounds were potent inhibitors of the CFTR-mediated Cl^– conductance. However,GlyH-101 also inhibited the VSORC conductance and the CaCC at concentrations used to inhibit CFTR. The CFTR_inh-172 did not affect the CaCC but did inhibit the VSORC, at concentrations higher than 5 μM. Neither inhibitor (20 μM; 24 h exposure) affected cell viability, but both were cytotoxic at higher concentrations Conclusions and Implications : Both inhibitors affected Cl^– conductances apart from CFTR. Our results provided insights into their use in mouse models.

British Journal of Pharmacology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Friard, Jonas published the artcileComparative effects of chloride channel inhibitors on LRRC8/VRAC-mediated chloride conductance, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Frontiers in Pharmacology (2017), 328/1-328/13, database is CAplus and MEDLINE.

Chloride channels play an essential role in a variety of physiol. functions and in human diseases. Historically, the field of chloride channels has long been neglected owing to the lack of powerful selective pharmacol. agents that are needed to overcome the tech. challenge of characterizing the mol. identities of these channels. Recently, members of the LRRC8 family have been shown to be essential for generating the volume-regulated anion channel (VRAC) current, a chloride conductance that governs the regulatory volume decrease (RVD) process. The inhibitory effects of six commonly used chloride channel inhibitors on VRAC/LRRC8-mediated chloride transport were tested in wild-type HEK-293 cells expressing LRRC8 proteins and devoid of other types of chloride channels (CFTR and ANO1/2). We explored the effectiveness of the inhibitors using the patch-clamp whole-cell approach and fluorescence-based quantification of cellular volume changes during hypotonic challenge. Both DCPIB and NFA inhibited VRAC current in a whole-cell configuration, with IC50 values of 5 ± 1 μM and 55 ± 2 μM, resp. Surprisingly, GlyH-101 and PPQ-102, two CFTR inhibitors, also inhibited VRAC conductance at concentrations in the range of their current use, with IC50 values of 10 ± 1 μM and 20 ± 1 μM, resp. T16Ainh-A01, a so-called specific inhibitor of calcium-activated Cl- conductance, blocked the chloride current triggered by hypo-osmotic challenge, with an IC50 of 6 ± 1 μM. Moreover, RVD following hypotonic challenge was dramatically reduced by these inhibitors. CFTRinh-172 was the only inhibitor that had almost no effect on VRAC/LRRC8-mediated chloride conductance. All inhibitors tested except CFTRinh-172 inhibited VRAC/LRRC8-mediated chloride conductance and cellular volume changes during hypotonic challenge. These results shed light on the apparent lack of chloride channel inhibitors specificity and raise the question of how these inhibitors actually block chloride conductances.

Frontiers in Pharmacology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Ma, Tonghui published the artcileThiazolidinone CFTR inhibitor identified by high-throughput screening blocks cholera toxin-induced intestinal fluid secretion, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Journal of Clinical Investigation (2002), 110(11), 1651-1658, database is CAplus and MEDLINE.

Secretory diarrhea is the leading cause of infant death in developing countries and a major cause of morbidity in adults. The cystic fibrosis transmembrane conductance regulator (CFTR) protein is required for fluid secretion in the intestine and airways and, when defective, causes the lethal genetic disease cystic fibrosis. We screened 50,000 chem. diverse compounds for inhibition of cAMP/flavone-stimulated Cl^– transport in epithelial cells expressing CFTR. Six CFTR inhibitors of the 2-thioxo-4-thiazolidinone chem. class were identified. The most potent compound discovered by screening of structural analogs, CFTR_inh-172, reversibly inhibited CFTR short-circuit current in less than 2 min in a voltage-independent manner with K₁ approx. 300 nM. CFTR_inh-172 was nontoxic at high concentrations in cell culture and mouse models. At concentrations fully inhibiting CFTR, CFTR_inh-172 did not prevent elevation of cellular cAMP or inhibit non-CFTR Cl^– channels, multidrug resistance protein-1 (MDR-1), ATP-sensitive K⁺ channels, or a series of other transporters. A single i.p. injection of CFTR_inh-172 (250 μg/kg) in mice reduced by more than 90% cholera toxin-induced fluid secretion in the small intestine over 6 h. Thiazolidinone CFTR inhibitors may be useful in developing large-animal models of cystic fibrosis and in reducing intestinal fluid loss in cholera and other secretory diarrheas.

Journal of Clinical Investigation published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Armirotti, Andrea published the artcileBioactive Thymosin Alpha-1 Does Not Influence F508del-CFTR Maturation and Activity, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Scientific Reports (2019), 9(1), 1-13, database is CAplus and MEDLINE.

Deletion of phenylalanine 508 (F508del) in the cystic fibrosis transmembrane conductance regulator (CFTR) anion channel is the most frequent mutation causing cystic fibrosis (CF). F508del-CFTR is misfolded and prematurely degraded. Recently thymosin a-1 (Ta-1) was proposed as a single mol.-based therapy for CF, improving both F508del-CFTR maturation and function by restoring defective autophagy. However, three independent laboratories failed to reproduce these results. Lack of reproducibility has been ascribed by the authors of the original paper to the use of DMSO and to improper handling. Here, we address these potential issues by demonstrating that Ta-1 changes induced by DMSO are fully reversible and that Ta-1 peptides prepared from different stock solutions have equivalent biol. activity. Considering the neg. results here reported, six independent laboratories failed to demonstrate F508del-CFTR correction by Ta-1. This study also calls into question the autophagy modulator cysteamine, since no rescue of mutant CFTR function was detected following treatment with cysteamine, while deleterious effects were observed when bronchial epithelia were exposed to cysteamine plus the antioxidant food supplement EGCG. Although these studies do not exclude the possibility of beneficial immunomodulatory effects of thymosin a-1, they do not support its utility as a corrector of F508del-CFTR.

Scientific Reports published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Kelly, Mairead published the artcileCystic fibrosis transmembrane regulator inhibitors CFTR_inh-172 and GlyH-101 target mitochondrial functions, independently of chloride channel inhibition, HPLC of Formula: 307510-92-5, the publication is Journal of Pharmacology and Experimental Therapeutics (2010), 333(1), 60-69, database is CAplus and MEDLINE.

Two highly potent and selective cystic fibrosis (CF) transmembrane regulator (CFTR) inhibitors have been identified by high-throughput screening: the thiazolidinone CFTR_inh-172 [3-[(3-trifluoromethyl)phenyl]-5-[(4-carboxyphenyl)methylene]-2-thioxo-4-thiazolidinone] and the glycine hydrazide GlyH-101 [N-(2-naphthalenyl)-((3,5-dibromo-2,4-dihydroxyphenyl)methylene)glycine hydrazide]. Inhibition of the CFTR chloride channel by these compounds has been suggested to be of pharmacol. interest in the treatment of secretory diarrheas and polycystic kidney disease. In addition, functional inhibition of CFTR by CFTR_inh-172 has been proposed to be sufficient to mimic the CF inflammatory profile. In the present study, we investigated the effects of the two compounds on reactive oxygen species (ROS) production and mitochondrial membrane potential in several cell lines: the CFTR-deficient human lung epithelial IB3-1 (expressing the heterozygous F508del/W1282X mutation), the isogenic CFTR-corrected C38, and HeLa and A549 as non-CFTR-expressing controls. Both inhibitors were able to induce a rapid increase in ROS levels and depolarize mitochondria in the four cell types, suggesting that these effects are independent of CFTR inhibition. In HeLa cells, these events were associated with a decrease in the rate of oxygen consumption, with GlyH-101 demonstrating a higher potency than CFTR_inh-172. The impact of CFTR inhibitors on inflammatory parameters was also tested in HeLa cells. CFTR_inh-172, but not GlyH-101, induced nuclear translocation of nuclear factor-κB (NF-κB). CFTR_inh-172 slightly decreased interleukin-8 secretion, whereas GlyH-101 induced a slight increase. These results support the conclusion that CFTR inhibitors may exert nonspecific effects regarding ROS production, mitochondrial failure, and activation of the NF-κB signaling pathway, independently of CFTR inhibition.

Journal of Pharmacology and Experimental Therapeutics published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, HPLC of Formula: 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Sonawane, N. D. published the artcileThiazolidinone CFTR inhibitors with improved water solubility identified by structure-activity analysis, HPLC of Formula: 307510-92-5, the publication is Bioorganic & Medicinal Chemistry (2008), 16(17), 8187-8195, database is CAplus and MEDLINE.

The thiazolidinone 3-[(3-trifluoromethyl)phenyl]-5-[(4-carboxyphenyl)methylene]-2-thioxo-4-thiazolidinone (CFTR_inh-172) inhibits cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel conductance with submicromolar affinity and blocks cholera toxin-induced intestinal fluid secretion. Fifty-eight CFTR_inh-172 analogs were synthesized to identify CFTR inhibitors with improved water solubility, exploring modifications in its two Ph rings, thiazolidinone core, and core-Ph connectors. Greatest CFTR inhibition potency was found for 3-CF₃ and polar group-substituted-Ph rings, and a thiazolidinone core. Two compounds with ∼1 μM CFTR inhibition potency and solubility >180 μM (>10-fold more than CFTR_inh-172) were identified: Tetrazolo-172, containing 4-tetrazolophenyl in place of 4-carboxyphenyl, and Oxo-172, containing thiazolidinedione in place of the thiazolidinone core. These water soluble thiazolidinone analogs had low cellular toxicity. The improved water solubility of Tetrazolo- and Oxo-172 make them potential lead candidates for therapy of secretory diarrheas and polycystic kidney disease.

Bioorganic & Medicinal Chemistry published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C19H36BNO2Si, HPLC of Formula: 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Srivastava, Jitendra Kumar published the artcilePharmacological evaluation of hybrid thiazolidin-4-one-1,3,5-triazines for NF-κB, biofilm and CFTR activity, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is RSC Advances (2015), 5(108), 88710-88718, database is CAplus.

Cystic fibrosis (CF) is a monogenetic disease caused mostly by the F508del mutation, a deletion of phenylalanine at position 508 of the CF transmembrane conductance regulator (CFTR) protein, which causes improper localization and functioning of this chloride channel in lung, pancreas, and intestine by affecting the normal fluid homeostasis. In CF the lungs are the most affected organ due to the accumulation of thick mucus, which results into heavy bacterial load and associated chronic inflammation. Therefore, novel state-of-the-art therapies are needed to circumvent this problem. To address this, a series of compounds (thiazolidin-4-one-1,3,5-triazines) was tested for the inhibition of NF-κB, and compounds SP6 and SP5 showed most significant activity (resp. with relative NF-κB activity: 1.82 ± 1.87 and 1.96 ± 1.56). Docking studies of the active compounds in the DNA binding surface of the N-terminal domains of NF-κB were also carried out to identify which structural motifs are vital for activity. These compounds were also tested for antibiofilm activity against P. aeruginosa and S. aureus where they showed MIC ranges from 7.81-125 μg mL^-1. The most active compound – SP6 was further assayed by micro-Ussing chamber experiments to determine its CFTR inhibitory properties, given its structural similarity to CFTR Inh₁₇₂. Results suggest that SP6 does not inhibit CFTR alone or in combination with Inh₁₇₂.

RSC Advances published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C11H8O3, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com