(2S,4R)-2-(tert-butoxycarbonyl)amino-4-formyl-γ-butyrolactone

(R)-4-oxo-1,2-pyrrolidinedicarboxylic acid dimethyl ester

(2R)-1-benzyloxy-2-hydroxy-pent-4-yne

反式-4-羟基-L-脯氨酸盐酸盐

Boc-L-羟脯氨酸