ethyl 3-(bromomethyl)pyridine-4-carboxylate

(2-氯-3-甲基吡啶-4-基)甲醇

3-甲基异烟酰肼

(2-氯-5-甲基吡啶-4-基)甲醇

ethyl 3-(chloromethyl)pyridine-4-carboxylate