7-methoxypterin

2-amino-7-methylsulfanyl-1H-pteridin-4-one

2-amino-7-propan-2-yloxy-1H-pteridin-4-one

2-氨基-7-乙氧基-4(1H)-蝶啶酮

2-amino-5,6,7,8-tetrahydro-3H-pteridin-4-one, sulfite