Amlodipine EP Impurity J Catalogue A236740 CAS 158151-92-9 M.W 436.93 M.F C22H29ClN2O5 Specifications FAQs 3-ethyl 5-isopropyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate