2,4'-二羟基二苯甲酮

3-(hydroxyiminomethyl)chromen-4-one

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

2-氨基-5H-[1]苯并吡喃并[4,3-d]嘧啶-5-醇

2-pyrrolidin-1-yl-5H-chromeno[4,3-d]pyrimidin-5-ol