(6Z)-6-[2-amino-5-(4-methoxyphenyl)-1H-pyrimidin-6-ylidene]cyclohexa-2,4-dien-1-one

2-amino-9-methyl-5H-chromeno[4,3-d]pyrimidin-5-ol

2-氨基-1,6-二氢-6-氧代-4-嘧啶乙酸

6-amino-5-ethylsulfanyl-2-methoxypyridine-3-carbonitrile

6-ethylthio-2,4,7-triaminopyrido[2,3-d]pyrimidine