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3H,4H-pyrido[3,2-d]pyrimidin-4-one
7-bromo-4-chloropyrido[3,2-d]pyrimidine
2,4-dichloro-6-methylpyrido[3,2-d]pyrimidine
![3H,4H-pyrido[3,2-d]pyrimidin-4-one](images/201806/source_img/11892_G_1528158635814.jpg)
![7-bromo-4-chloropyrido[3,2-d]pyrimidine](images/201806/source_img/9736_G_1528158534434.jpg)
![2,4-dichloro-6-methylpyrido[3,2-d]pyrimidine](images/201806/source_img/283_G_1528157203915.jpg)