methyl (3S)-3-[(tert-butoxy)carbonylamino]hept-6-enoate

methyl (2S,3S)-2-allyl-3-[(tert-butoxy)carbonylamino]hept-6-enoate

(S)-methyl 2-(tert-butoxycarbonylamino)-8-hydroxydecanoate

(6S,9R,16S)-methyl 16-[(tert-butoxycarbonyl)amino]-9-(methoxycarbonyl)-2,2,6-trimethyl-4,7-dioxo-3-oxa-11-thia-5,8-diazaheptadecan-17-oate

tert-butyl (2-((S)-2-((tert-butoxycarbonyl)amino)hex-5-enamido)-2-methylpropanoyl)-L-phenylalanyl-D-prolinate