(2S)-N'-[2-tert-butoxycarbonylamino-5-(tert-butyl-dimethyl-silanyloxy)-pentanoyl]-N-methyl-hydrazinecarboxylic acid benzyl ester

(2R,4R,5S)-2-benzyl-5-tert-butoxycarbonylamino-4-(tert-butyldimethylsilanyloxy)-7-(2,4,6-trimethoxybenzylcarbamoyl)heptanoic acid

(R)-N-tert-butoxycarbonyl-δ-(9-adeninyl)norvaline

(S)-N-tert-butoxycarbonyl-δ-(9-adeninyl)norvaline