(S)-4,11-Bis(((butoxycarbonyl)amino)methyl)-10-carboxy-5-oxo-2,4,6,11,13-pentaazatetradecanedioic acid, 1,14-dibutyl ester 2,8-Di-N-bis(n-butyloxycarbonylaminomethyl)-L-citrulline 65132-74-3 A 924 A-924