2,4-diamino-5-methyl-6-(2,5-dimethoxybenzyl)-7-chloro-pyrido[2,3-d]pyrimidine

2,5-二甲氧基苯甲醛

ethyl α-(2,5-dimethoxybenzylidene)acetoacetate

ethyl α-acetyl-β-(2,5-dimethoxyphenyl)propionate

2,4-diamino-5-methyl-6-(2,5-dimethoxybenzyl)-7-oxo-7,8-dihydropyrido[2,3-d ]pyrimidine