... Chemistry Synthesis of 1,4-Dihydropyridine Derivatives from Sub- stituted Pyridinecarboxaldehydes (5) Prepared compounds are listed in Tables l ... l 0 Me Me CH2CH2NMe2 diltiazem N02 /Me CDZCH2CH2N~\ CH2 Me H nicardipine 1990 Pharmaceutical Society of ... 2450 ...