1-(4-(Ethyl(2-(4-methoxyphenyl)-1-methylethyl)amino)-1-oxobutyl)-N-methyl-4-piperidinecarboxamide 120627-70-5 4-Piperidinecarboxamide, 1-(4-(ethyl(2-(4-methoxyphenyl)-1-methylethyl)amino)-1-oxobutyl)-N-methyl- DU 121403 DU-121403 N-Desmethylidaverine