methyl 2-methyl-4-(3,4-(methylenedioxy)phenyl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, (S)-(-)-isomer
methyl 2-methyl-4-(3,4-(methylenedioxy)phenyl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, (s)-(-)-isomer