(3R,4S)-3-(三乙基硅氧基)-4-苯基-2-氧-氮杂环丁-1-甲酸叔丁酯

(3R,4S)-4-苯基-3-[(三乙基硅烷基)氧基]-2-氮杂环丁酮

(3R,4S)-3-(1-乙氧乙氧基)-2-氧-4-苯基-吖丁啶羧酸叔丁基酯

(3R,4S)-1-苯甲酰-3-[(三乙基硅)氧基]-4-苯基-2-氮杂环丁酮

(3R,4S)-3-hydroxy-3-methyl-4-phenylazetidin-2-one