(S)-tert-butyl 2-((tert-butyldimethylsilyloxy)methyl)-2,5-dihydro-1H-pyrrole-1-carboxylate

(4S,2Z)-5-(tert-Butyldimethylsilyloxy)-4-[(tert-butoxycarbonyl)amino]pent-2-en-1-ol

Ethyl (4S,2Z)-5-(tert-butyldimethylsilyloxy)-4-[(tert-butoxycarbonyl)amino]pent-2-enoate

Methanesulfonic acid (Z)-(S)-4-tert-butoxycarbonylamino-5-(tert-butyl-dimethyl-silanyloxy)-pent-2-enyl ester