4-Piperidinecarboxylic acid, 4-(((phenylamino)carbonyl)amino)-1-(phenylmethyl)-, ethyl ester 5-22-13-00539 (Beilstein Handbook Reference) 57611-97-9 BRN 0498783 Benzyl-1 (phenyl-3' ureido-1')-4 isonipecotate d' ethyle [French] Ethyl 4-(((phenylamino)carbonyl)amino)-1-(phenylmethyl)-4-piperidinecarboxylate