N-Boc-3-哌啶酮

trans-(1R,2R)-1-(benzyloxycarbonylamino)-2-hydroxymethyl-cyclohexane

(3S)-3-[(4-氟苯基)甲基]-哌啶

N-boc-3-(4-氟苄基)哌啶

t-butyl 3-(4-fluorobenzylidene)-1-piperidinecarboxylate