for the following products
3-Ethyl 5-methyl 4-(2-chlorophenyl)-2-((2-(1,3-dioxoisoindolin-2-yl)ethoxy)methyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate | 3-Ethyl-5-methyl-4-(2-chlorophenyl)-2-(2-phthalimidoethoxl)-methyl-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate | Amlodipine EP Impurity A | Phthaloyl amlodipine and Amlodipine intermediate
