1-Methyl-4-(p-dimethylcarbamoxyphenyl)piperidine hydrochloride Carbamic acid, dimethyl-, p-(1-methyl-4-piperidyl)phenyl ester, hydrochloride Dimethylcarbamic acid p-(1-methyl-4-piperidyl)phenyl ester hydrochloride FA2620000 NU-298