(2S,3S)-3-(benzyloxyamino)-2-(tert-butoxyformamido)butyric acid

(2S,3S)-3-methylamino-2-(tert-butoxyformamido)butyric acid

(2S,3S)-N2-[(tert-butoxy)carbonyl]-N3-[[N-(fluoren-9-ylmethoxy)carbonyl]-L-alanyl]-N3-methyl-diaminobutyramide

1-[5-(2S,3S)-N2-[(tert-butoxy)carbonyl]-N3-[[N-(fluoren-9-ylmethoxy)carbonyl]-L-alanyl]-N3-methyl-diaminobutyramido-3,5-dideoxy-α-L-arabinofuranodyl]uracil

(2S,3S)-3-((benzyloxy)methylamino)-2-(tert-bytoxyformamido)butyric acid