1-(tert-butyl) 2-ethyl (2S,4S)-4-methoxypyrrolidine-1,2-dicarboxylate

N-tert-butoxycarbonyl-(2S,4S)-4-methoxyproline benzyl ester

1-(tert-butyl) 2-ethyl (2S,4S)-4-((4-nitrobenzoyl)oxy)pyrrolidine-1,2-dicarboxylate

1-叔丁氧羰基-(4R)-羟基-2-脯氨酸乙脂

L-羟基脯氨酸