Benzyl {(1S)-4-[(tert-butoxycarbonyl)amino]-1-[({(4S)-4-[(tert-butoxycarbonyl)amino]-5-hydroxypentyl}amino)carbonyl]butyl}carbamate
N-(tert-butyloxycarbonyl)-L-valyl-L-valyl-N7-benzyl-N7-(benzyloxycarbonyl)-4(S),7-diamino-3(R,S)-hydroxyheptanoic acid ethyl ester
N-isovaleryl-L-valyl-L-valyl-N7-benzyl-N7-(benzyloxycarbonyl)-4(S),7-diamino-3(R,S)-hydroxyheptanoic acid ethyl ester
N-(tert-butyloxycarbonyl)-L-valyl-N7-benzyl-N7-(benzyloxycarbonyl)-4(S),7-diamino-3(R,S)-hydroxyheptanoic acid ethyl ester
N4-(tert-butyloxycarbonyl)-N7-benzyl-N7-(benzyloxycarbonyl)-4(S),7-diamino-3(RS)-hydroxyheptanoic acid ethyl ester