(4-吡啶基)丙酮

2-[2-(trifluoromethyl)pyridin-4-yl]acetic acid

4-(2-氧代乙基)哌啶-1-羧酸叔丁酯

1-叔丁氧羰基-4-哌啶乙酸

吡啶-4-乙酸甲酯