the most abundant urinary metabolite was derived from debenzylation of the n-benzyl-n-methylaminoethyl ester side-chain in dogs and humans , and from hydrolysis of the same side-chain to the carboxylic acid , together with oxidation of the dihydropyridine nucleus to pyridine , in rats and monkeys .
C0014898
ester
C0007066
carboxylic acid