(5S,7R)-7-fluoro-2,2-bis(trifluoromethyl)-1-aza-3-oxabicyclo[3.3.0]octan-4-one

(6S,7aS)-6-hydroxy-3,3-bis(trifluoromethyl)tetrahydro-pyrrolo[1,2-c]oxazol-1-one

N-Boc-反式-4-氟-L-脯氨酸

反式-4-羟基-L-脯氨酸甲酯盐酸盐

(4R)-4-羟基-1-三苯甲基-L-脯氨酸甲酯