顺式-4-羟基-L-脯氨酸

(1S,4S)-3-(R/S)-methoxy-2-oxa-5-aza-bicyclo[2.2.1]heptane

(1S,4S)-N-Cbz-6-(R/S)-methoxy-5-oxa-2-aza-bicyclo[2.2.1]heptane