3-(苄氧基)-6-甲基-4-氧代-4H-吡喃-2-羧酸

3-羟基-2,6-二甲基吡喃-4-酮

2-(aminomethyl)-6-methyl-3-phenylmethoxypyran-4-one

(6-methyl-4-oxopyran-3-yl) benzoate

2-methyl-5-phenylmethoxy-1-(2-piperidin-1-ylethyl)pyridin-4-one