顺-2-戊烯腈

1-乙基-1,2,5,6-四氢吡啶

3,6-dihydro-2H-pyridin-1-yl(phenyl)methanone

(3S,4S)-4-tert-butoxycarbonylamino-3-hydroxypiperidine-1-carboxylic acid benzyl ester

(3R,4r)-苄基 4-(叔丁氧基羰基氨基)-3-羟基哌啶-1-羧酸