2,4-二氯吡啶并[3,2-d]嘧啶

3-(4-methoxybenzyl)pyrido[3,2-d]pyrimidine-2,4(1H,3H)-dione

2,3-吡啶二羧酸酐

吡啶并[3,2-d]嘧啶-2,4(1H,3H)-二酮

2-(甲氧基羰基)烟酸