1-(4-氟苯基)-哌啶-4-酮

1-(2-羟乙基)-4-哌啶酮乙二醇缩酮

4-(2-benzhydryloxyethyl)-1-benzylpiperidine

2-哌啶基吡啶

2-(2-hexylpiperidin-1-yl)pyridine