5,6,7,8-四氢-2-甲基-吡啶并[4,3-d]嘧啶-4(3h)-酮

1-乙酰基-4-氧代-3-哌啶羧酸甲酯

8-ethyl-1,2,3,4-tetrahydrochromeno[3,4-c]pyridin-5-one

8-methyl-1,2,3,4-tetrahydrochromeno[3,4-c]pyridin-5-one

1,2,3,4-tetrahydrochromeno[3,4-c]pyridin-5-one