Synthesis, characterization and development of validated RP-HPLC method for the estimation of process-related impurity diethyl 4-(3-chlorophenyl)-2, 6-dimethyl-1, 4-dihydropyridine-3, 5-dicarboxylate from amlodipine bulk and formulation. Int J of Pharm Chem [Internet]. 2015 May 30 [cited 2026 Mar. 10];5(5):172-80. Available from: https://ssjournals.co.in/index.php/ijpc/article/view/1984