(S)-Lercanidipine Hydrochloride is the enantiomerically pure hydrochloride salt of the calcium channel blocker Lercanidipine, featuring a chiral dihydropyridine core substituted with a nitrophenethyl ester and a 2-(3-butenyloxy)ethyl side chain. The (S)-configuration at the stereocenter differentiates it from the parent racemic drug, introducing distinct stereochemical interactions. This impurity arises during enantioselective synthesis or resolution processes. It serves as an HPLC reference standard for enantioselective purity profiling in pharmaceutical quality control.
