(2S,3S)-3-[tert-butoxycarbonyl-(4-methoxybenzyl)-amino]hex-5-en-1,2-diol

diethyl 2-acetamido-2-(2-bromoallyl)malonate

L-2-氨基-4-溴-4-戊烯酸

(S)-2-Acetylamino-4-bromo-pent-4-enoic acid

ethyl 2-acetamido-4-bromopent-4-enoate