(S)-2-(苄氧羰氨基)-3-丁烯酸甲酯

(S)-2-Cbz-氨基丁烷-1,4-二醇

benzyl N-(2,5-dioxooxolan-3-yl)carbamate

(S)-2-苄氧基羰基氨基-1,4-双(甲烷磺酰氧基)丁烷

ditert-butyl (2S)-2-aminobutanedioate