1-苄基-4-哌啶甲酸甲酯

[4-(hydroxymethyl)piperidin-1-yl]-phenylmethanone

1-苯甲酰哌啶-4-羧酸

(1-苄基-1,2,3,6-四氢吡啶-4-基)甲醇

4-哌啶甲酸乙酯