(S)-6-amino-2-(((2,3-diamino-3-oxopropyl)amino)methyl)-5-methylpyrimidine-4-carboxylic acid

ethyl 2-<1-<<(S)-2-<(tert-butoxycarbonyl)amino>-2-carbamoylethyl>amino>-2-<(tert-butylthio)carbonyl>ethyl>-6-chloro-5-methylpyrimidine-4-carboxylate

Nα,Nβ-bis(tert-butoxycarbonyl)-Nβ-<(4-amino-6-carboxy-5-methylpyrimidin-2-yl)methyl>-(S)-β-aminoalanineamide