Archives for Chemistry Experiments of Chalcone

Category: thiazolidines. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Category: thiazolidines. In 2019.0 J MOL STRUCT published article about BIOLOGICAL EVALUATION; GA-MLR; ANTICANCER; AGENTS; DOCKING; ANALOGS; DESIGN; MODEL; QSPR in [Ahmadi, Shahin] Islamic Azad Univ, Dept Chem, Kermanshah Branch, Kermanshah, Iran; [Mardinia, Fariba; Balali, Ebrahim] Islamic Azad Univ, Dept Chem, Fac Pharmaceut Chem, Tehran Med Sci, Tehran, Iran; [Azimi, Neda] Islamic Azad Univ, Dept Chem Engn, Kermanshah Branch, Kermanshah, Iran; [Qomi, Mahnaz] Islamic Azad Univ, Act Pharmaceut Ingredients Res APIRC, Tehran Med Sci, Tehran, Iran in 2019.0, Cited 43.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

The anticancer activity of chalcones and their analogs is the most important biological activity of them among their broad spectrum of their biological activity. In this investigation, we performed quantitative structure-activity relationship (QSAR) modeling of the anticancer activity of 134 chalcones and their analogs against MCF-7 human breast cancer cell lines using Monte Carlo method. QSAR models were calculated by CORAL software and optimal descriptors were calculated with SMILES and hydrogen suppressed molecular graph (HSG). The total dataset split into training, invisible training, calibration, and validation set randomly. Analysis of three probes of the Monte Carlo optimization with three random splits was done. Results from three random splits displayed robust, very simple, predictable, and reliable models for training, invisible training, calibration, and validation set with the correlation coefficient (R-2) of 0.8142-0.8244, 0.8244-0.8699, 0.8125-0.8627 and 0.8290-0.8686 respectively. As a result, the obtained models help to identify the hybrid descriptors for the increase and the decrease of anticancer activity of chalcones against MCF-7 human breast cancer cell lines. This simple QSAR model can be used for prediction of log IC50 of numerous chalcone derivatives against breast cancer cell. (C) 2019 Elsevier B.V. All rights reserved.

Category: thiazolidines. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Why Are Children Getting Addicted To 94-41-7

Welcome to talk about 94-41-7, If you have any questions, you can contact Toth, S; Szepesi, A; Tran-Nguyen, VK; Sarkadi, B; Nemet, K; Falson, P; Di Pietro, A; Szakacs, G; Boumendjel, A or send Email.. Application In Synthesis of Chalcone

Authors Toth, S; Szepesi, A; Tran-Nguyen, VK; Sarkadi, B; Nemet, K; Falson, P; Di Pietro, A; Szakacs, G; Boumendjel, A in MDPI published article about COLLATERAL SENSITIVITY; CANCER; THIOSEMICARBAZONES; AURONES in [Toth, Szilard; Szepesi, Aron; Sarkadi, Balazs; Nemet, Katalin; Szakacs, Gergely] Hungarian Acad Sci, Res Ctr Nat Sci, Inst Enzymol, H-1117 Budapest, Hungary; [Tran-Nguyen, Viet-Khoa; Boumendjel, Ahcene] Univ Grenoble Alpes, Dept Pharmacochim Mol, UMR 5063, F-38041 Grenoble, France; [Nemet, Katalin] Creat Cell Ltd, H-1119 Budapest, Hungary; [Falson, Pierre; Di Pietro, Attilio] Univ Lyon, CNRS UMR 5086, Mol Microbiol & Struct Biochem Lab, Drug Resistance & Membrane Prot Grp,IBCP, 7 Passage Vercors, F-69367 Lyon, France; [Szakacs, Gergely] Med Univ Vienna, Inst Canc Res, Borschkegasse 8A, A-1090 Vienna, Austria in 2020, Cited 30. Application In Synthesis of Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

The resistance of tumors against anticancer drugs is a major impediment for chemotherapy. Tumors often develop multidrug resistance as a result of the cellular efflux of chemotherapeutic agents by ABC transporters such as P-glycoprotein (ABCB1/P-gp), Multidrug Resistance Protein 1 (ABCC1/MRP1), or Breast Cancer Resistance Protein (ABCG2/BCRP). By screening a chemolibrary comprising 140 compounds, we identified a set of naturally occurring aurones inducing higher cytotoxicity against P-gp-overexpressing multidrug-resistant (MDR) cells versus sensitive (parental, non-P-gp-overexpressing) cells. Follow-up studies conducted with the P-gp inhibitor tariquidar indicated that the MDR-selective toxicity of azaaurones is not mediated by P-gp. Azaaurone analogs possessing pronounced effects were then designed and synthesized. The knowledge gained from structure-activity relationships will pave the way for the design of a new class of anticancer drugs selectively targeting multidrug-resistant cancer cells.

Welcome to talk about 94-41-7, If you have any questions, you can contact Toth, S; Szepesi, A; Tran-Nguyen, VK; Sarkadi, B; Nemet, K; Falson, P; Di Pietro, A; Szakacs, G; Boumendjel, A or send Email.. Application In Synthesis of Chalcone

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Simple exploration of Chalcone

Welcome to talk about 94-41-7, If you have any questions, you can contact Kapkoti, DS; Singh, S; Alam, S; Khan, F; Luqman, S; Bhakuni, RS or send Email.. Quality Control of Chalcone

An article In vitroantiproliferative activity of glabridin derivatives and theirin silicotarget identification WOS:000539722400011 published article about INHIBITS MIGRATION; ISOFLAVAN GLABRIDIN; LICORICE ROOT; INVASION; ANGIOGENESIS; CELLS in [Kapkoti, Deepak Singh; Bhakuni, Rajendra Singh] CSIR Cent Inst Med & Aromat Plants, Med Chem Dept, Lucknow, Uttar Pradesh, India; [Singh, Shilpi; Luqman, Suaib] CSIR Cent Inst Med & Aromat Plants, Mol Bioprospect Dept, Lucknow, Uttar Pradesh, India; [Alam, Sarfaraz; Khan, Feroz] CSIR Cent Inst Med & Aromat Plants, Metab & Struct Biol Dept, Lucknow, Uttar Pradesh, India in 2020.0, Cited 19.0. Quality Control of Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Novel Mannich base derivatives of glabridin were synthesized and their antiproliferative activity were performed along with our previously reported glabridin-chalcone hybrids molecules (GCHMs) against various human cell lines MDA-MB-231 (breast adenocarcinoma), HEK-293 (embryonic kidney cell line), K562 (leukemia), MCF-7 (breast adenocarcinoma), HeLa (cervix adenocarcinoma), HepG2 (hepatocellular carcinoma) and WRL-68 (hepatic carcinoma). The result showed that the glabridin significantly reduced cell proliferation with IC(50)ranges from 3.67 to 58.30 mu M against all the tested cell lines. The remarkable reduction in antiproliferative activity 2′,4′-dimethoxyglabridin and GCHMs compounds with phenolic OH groups protected by methoxy (OCH3) groups suggested that the free OH groups are essential factor for the antiproliferative activity of glabridin and its derivatives. The Mannich base derivatives of glabridin showed moderate activity IC50(2.20->95.78 mu M). Furthermore,in silicotarget identification analysis revealed that AKT1, DECR1 and NOS1 are the potential targets for glabridin and their derivatives.

Welcome to talk about 94-41-7, If you have any questions, you can contact Kapkoti, DS; Singh, S; Alam, S; Khan, F; Luqman, S; Bhakuni, RS or send Email.. Quality Control of Chalcone

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Some scientific research about Chalcone

Welcome to talk about 94-41-7, If you have any questions, you can contact Draskovits, M; Kalaus, H; Stanetty, C; Mihovilovic, MD or send Email.. COA of Formula: C15H12O

I found the field of Chemistry very interesting. Saw the article Intercepted dehomologation of aldoses by N-heterocyclic carbene catalysis – a novel transformation in carbohydrate chemistry published in 2019.0. COA of Formula: C15H12O, Reprint Addresses Stanetty, C (corresponding author), TU Wien, Inst Appl Synthet Chem, A-1060 Vienna, Austria.. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone

The development of an N-heterocyclic carbene (NHC) catalysed intercepted dehomologation of aldoses is reported. The unique selectivity of NHCs for aldehydes is exploited in the complex context of reducing sugars. Examples of strong substrate governance for either intercepted dehomologation or a subsequent redox-lactonisation were identified and mechanistically understood. More importantly, it was shown that catalyst design allowed the tuning of the selectivity of the reaction with structurally unbiased starting materials towards either of the two scenarios.

Welcome to talk about 94-41-7, If you have any questions, you can contact Draskovits, M; Kalaus, H; Stanetty, C; Mihovilovic, MD or send Email.. COA of Formula: C15H12O

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

New learning discoveries about Chalcone

Formula: C15H12O. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Formula: C15H12O. In 2020.0 J ETHNOPHARMACOL published article about CHINESE HERBAL MEDICINE; URSODEOXYCHOLIC ACID; ALLERGIC RHINITIS; LIVER; NAPHTHYLISOTHIOCYANATE; ACUPUNCTURE; EFFICACY in [Zhang, Zhiyong; Miao, Yiru; Xu, Min; Cheng, Wenming; Yang, Chuanyan; She, Xiangjian; Geng, Qianqian; Zhang, Qunlin] Anhui Med Univ, Sch Pharm, Hefei 230032, Anhui, Peoples R China in 2020.0, Cited 54.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

Ethnopharmacological relevance: TianJiu (TJ) therapy, one type of cold moxibustion, applies to specific acupuncture points with herbal patches of hot nature, providing a constant irritant to the skin until the presence of hyperemia and blistering. Traditional and clinical reports suggest that TJ is an effective therapy for the treatment of jaundice with fresh Ranunculus sceleratus L. (RS), in which protoanemonin is one of the main irritant constituents. However, the therapeutic effect of TJ treatment with fresh RS against intrahepatic cholestasis has not been studied in animal experiments. Aim of the study: Present study was undertaken to investigate the effect of TJ treatment with fresh RS against intrahepatic cholestasis in rats and provide an experimental basis for the underlying mechanism of TJ therapy. Materials and methods: Male intrahepatic cholestatic Sprague-Dawley rats induced by 2% alpha-naphthylisothiocyanate (ANIT, 80 mg/kg B.W.) were treated by TJ therapy with fresh RS. The levels of serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), direct bilirubin (DBIL), total bilirubin (TBIL), total bile acid (TBA), hepatic malondialdehyde (MDA) and nitric monoxide (NO), as well as hepatic body ratio, bile flow and hepatic histopathological assay were measured and evaluated to investigate the therapeutic effect of TJ treatment with fresh RS. Phytochemical analysis of fresh and dried RS was performed by gas chromatography-mass spectrometer (GC-MS). Results: After TJ treatment with fresh RS, the abnormally elevated levels of serum AST, ALT, ALP, DBIL, TBIL and TBA, as well as hepatic MDA and NO at 108 h were reduced significantly (versus model group, P < 0.01). The hepatic body ratio, bile flow and hepatic pathological change of cholestatic rats at 108 h in TJ group were restored when compared with those of model group. Thirty-one compounds including lactones, flavonoids and phenolic acids were identified and determined by GC-MS analysis. The content of protoanemonin in fresh RS (9.49%) was about 25-fold higher than that in dried RS (0.38%). Conclusions: TJ treatment with fresh RS exhibited good therapeutic effect on ANIT-induced intrahepatic cholestasis in rats, which may be due to the attenuated oxidative stress in the liver tissue. It is rational for the ancients to choose fresh RS as TJ herbal patches because of its abundant protoanemonin with the character of irritant. The qualitative and quantitative results of GC-MS analysis provided the chemical basis of TJ therapy with fresh RS, which can be regarded as a simple and efficient method for the treatment of cholestasis hepatitis. Formula: C15H12O. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

When did you first realize you had a special interest and talent in94-41-7

Safety of Chalcone. Welcome to talk about 94-41-7, If you have any questions, you can contact Zeitoun, H; Khan, Z; Banerjee, K; Salameh, D; Lteif, R or send Email.

Authors Zeitoun, H; Khan, Z; Banerjee, K; Salameh, D; Lteif, R in MDPI published article about RESPONSE-SURFACE METHODOLOGY; TYROSINASE INHIBITORS; PHENOLIC-COMPOUNDS; ANTIOXIDANTS; LEAVES; FOOD in [Zeitoun, Hussein; Salameh, Dominique; Lteif, Roger] Univ St Joseph, Fac Sci, Ctr Anal & Rech, Unite Technol & Valorisat Alimentaire, Campus Sci & Technol,POB 11-514, Beirut 11072050, Lebanon; [Khan, Zareen; Banerjee, Kaushik] ICAR Natl Res Ctr Grapes, Natl Reference Lab, Pune 412307, Maharashtra, India in 2020.0, Cited 55.0. Safety of Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Tyrosinase is an important component of the enzyme polyphenol oxidase, which upon contact with the phenolic substrates forms the pigment melanin and induces undesirable food browning. The phenolic and triterpenoid compounds that naturally occur in plants are well known as tyrosinase inhibitors. Combretum micranthum (CM) leaves, Euphorbia hirta (EH) plant, and Anacardium occidentale (AO) fruits are traditionally known to have potential anti-tyrosinase activities. The aim of this study was to optimize the ultrasound-assisted extraction of secondary metabolites from these matrices, and to evaluate in tubo the antityrosinase activity of these extracts. Efforts were also taken to profile the secondary metabolites, mainly the phenolic and triterpenoid compounds, in order to understand their probable association with tyrosinase inhibition. The optimal ultrasound-assisted extraction conditions for simultaneous extraction of phenolic, and triterpenoid compounds were determined. The aqueous fraction of these extracts showed significant antityrosinase activity, with the CM leaves exhibiting the strongest inhibitory effect (IC50 of 0.58 g.L-1). The predominant metabolic compounds from these natural extracts were putatively identified by using a high-resolution quadrupole-time of flight (QToF) LC-MS instrument. The high-resolution accurate mass-based screening resulted in identification of 88 predominant metabolites, which included dihydrodaidzein-7-O-glucuronide, micromeric acid, syringic acid, morin, quercetin-3-O-(6 ”-malonyl-glucoside), 4-hydroxycoumarin, dihydrocaffeic acid-3-O-glucuronide, to name some, with less than 5 ppm of mass error.

Safety of Chalcone. Welcome to talk about 94-41-7, If you have any questions, you can contact Zeitoun, H; Khan, Z; Banerjee, K; Salameh, D; Lteif, R or send Email.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Why Are Children Getting Addicted To Chalcone

Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.. Computed Properties of C15H12O

Computed Properties of C15H12O. Authors Morreeuw, ZP; Escobedo-Fregoso, C; Rios-Gonzalez, LJ; Castillo-Quiroz, D; Reyes, AG in ELSEVIER IRELAND LTD published article about in [Morreeuw, Zoe P.] Ctr Invest Biol Noroeste CIBNOR, Ave Inst Politecn Nacl 195, La Paz 23096, Bcs, Mexico; [Escobedo-Fregoso, Cristina; Reyes, Ana G.] CONACYTCIBNOR, Ave Inst Politecn Nacl 195, La Paz 23096, Bcs, Mexico; [Rios-Gonzalez, Leopoldo J.] Univ Autonoma Coahuila UAdeC, Fac Ciencias Quim, Dept Biotecnol, Blvd V Carranza, Saltillo 25280, Coahuila, Mexico; [Castillo-Quiroz, David] Inst Nacl Invest Forest Agr & Pecuarias INIFAP, Carretera Saltillo Zacatecas 9515, Saltillo 25315, Coahuila, Mexico in 2021.0, Cited 126.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Agave lechuguilla is one of the most abundant species in arid and semiarid regions of Mexico, and is used to extract fiber. However, 85 % of the harvested plant material is discarded. Previous bioprospecting studies of the waste biomass suggest the presence of bioactive compounds, although the extraction process limited metabolite characterization. This work achieved flavonoid profiling of A. lechuguilla in both processed and non-processed leaf tissues using transcriptomic analysis. Functional annotation of the first de novo transcriptome of A. lechuguilla (255.7 Mbp) allowed identifying genes coding for 33 enzymes and 8 transcription factors involved in flavonoid biosynthesis. The flavonoid metabolic pathway was mostly elucidated by HPLC-MS/MS screening of alcoholic extracts. Key genes of flavonoid synthesis were higher expressed in processed leaf tissues than in non-processed leaves, suggesting a high content of flavonoids and glycoside derivatives in the waste biomass. Tar-geted HPLC-UV-MS analyses confirmed the concentration of isorhamnetin (1251.96 ?g), flavanone (291.51 ?g), hesperidin (34.23 ?g), delphinidin (24.23 ?g), quercetin (15.57 ?g), kaempferol (13.71 ?g), cyanidin (12.32 ?g), apigenin (9.70 ?g) and catechin (7.91 ?g) per gram of dry residue. Transcriptomic and biochemical profiling concur in the potential of lechuguilla by-products with a wide range of applications in agriculture, feed, food, cosmetics, and pharmaceutical industries.

Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.. Computed Properties of C15H12O

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

What I Wish Everyone Knew About 94-41-7

Welcome to talk about 94-41-7, If you have any questions, you can contact Song, L; Fu, NK; Ernst, BG; Lee, WH; Frederick, MO; DiStasio, RA; Lin, S or send Email.. Formula: C15H12O

I found the field of Chemistry very interesting. Saw the article Dual electrocatalysis enables enantioselective hydrocyanation of conjugated alkenes published in 2020.0. Formula: C15H12O, Reprint Addresses DiStasio, RA; Lin, S (corresponding author), Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14850 USA.. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone

Chiral nitriles and their derivatives are prevalent in pharmaceuticals and bioactive compounds. Enantioselective alkene hydrocyanation represents a convenient and efficient approach for synthesizing these molecules. However, a generally applicable method featuring a broad substrate scope and high functional group tolerance remains elusive. Here, we address this long-standing synthetic problem using dual electrocatalysis. Using this strategy, we leverage electrochemistry to seamlessly combine two canonical radical reactions-cobalt-mediated hydrogen-atom transfer and copper-promoted radical cyanation-to accomplish highly enantioselective hydrocyanation without the need for stoichiometric oxidants. We also harness electrochemistry’s unique feature of precise potential control to optimize the chemoselectivity of challenging substrates. Computational analysis uncovers the origin of enantio-induction, for which the chiral catalyst imparts a combination of attractive and repulsive non-covalent interactions to direct the enantio-determining C-CN bond formation. This work demonstrates the power of electrochemistry in accessing new chemical space and providing solutions to pertinent challenges in synthetic chemistry.

Welcome to talk about 94-41-7, If you have any questions, you can contact Song, L; Fu, NK; Ernst, BG; Lee, WH; Frederick, MO; DiStasio, RA; Lin, S or send Email.. Formula: C15H12O

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

What I Wish Everyone Knew About Chalcone

Name: Chalcone. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Name: Chalcone. I found the field of Chemistry very interesting. Saw the article PyridineN-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides published in 2020.0, Reprint Addresses Li, XY (corresponding author), Shandong Univ, Key Lab Special Funct Aggregated Mat, Sch Chem & Chem Engn, Minist Educ, Shanda Nanlu 27, Jinan 250100, Peoples R China.. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone.

Five [PSiP]-pincer iron hydrides1-5, [(2-Ph2PC6H4)(2)HSiFe(H)(PMe3)(2)(1), (2-Ph2PC6H4)(2)MeSiFe(H)(PMe3)(2)(2), (2-Ph2PC6H4)(2)PhSiFe(H)(PMe3)(2)(3), (2-(iPr)(2)PC6H4)(2)HSiFe(H)(PMe3) (4), and (2-(iPr)(2)PC6H4)(2)MeSiFe(H)(PMe3)(2)(5)], were used as catalysts to study the effects of pyridine N-oxide and the electronic properties of [PSiP]-ligands on the catalytic hydrosilylation of carbonyl compounds. It was proved for the first time that this catalytic process could be promoted with pyridine N-oxide as the initiator at 30 degrees C because the addition of pyridineN-oxide is beneficial for the formation of an unsaturated hydrido iron complex, which is the key intermediate in the catalytic mechanism. Complex 4 as the best catalyst shows excellent catalytic performance. Among the five complexes, complex 3 was new and the molecular structure of complex 3 was determined by single crystal X-ray diffraction. A proposed mechanism was discussed.

Name: Chalcone. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Brief introduction of 94-41-7

Welcome to talk about 94-41-7, If you have any questions, you can contact Zhou, T; Ji, X; Zhang, JL; Liu, L or send Email.. Category: thiazolidines

An article Phosphine-catalyzed conjugate cyanation of beta-trifluoromethyl enones: access to alpha-trifluoromethyl gamma-carbonyl nitriles WOS:000569870300004 published article about MORITA-BAYLIS-HILLMAN; RAUHUT-CURRIER REACTIONS; LEWIS-BASE CATALYSIS; STRECKER REACTION; ASYMMETRIC CYANATION; MANNICH REACTIONS; CHIRAL PHOSPHINE; CYANOSILYLATION; LIGANDS; KETONES in [Zhou, Tao; Ji, Xin; Liu, Lu] East China Normal Univ, Sch Chem & Mol Engn, 500 Dongchuan Rd, Shanghai 200241, Peoples R China; [Zhang, Junliang] Fudan Univ, Dept Chem, 2005 Songhu Rd, Shanghai 200438, Peoples R China; [Liu, Lu] East China Normal Univ, Shanghai Engn Res Ctr Mol Therapeut & New Drug De, Shanghai 200062, Peoples R China in 2020.0, Cited 76.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Category: thiazolidines

Herein, we developed an efficient conjugate cyanation of beta-trifluoromethyl enones with TMSCN mediated by phosphine. In this transformation, the key organophosphorus zwitterion, which was generatedin situby mixing organophosphine with methyl acrylate, could enable this transformation as a highly efficient Lewis base catalyst.

Welcome to talk about 94-41-7, If you have any questions, you can contact Zhou, T; Ji, X; Zhang, JL; Liu, L or send Email.. Category: thiazolidines

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com