2,4,6,8-四氯嘧啶并[5,4-d]嘧啶

5-氨基尿嘧啶

2,4,6,8-四羟基嘧啶并[5,4-D]嘧啶

乳清酸

2,4,8-trichloropyrimido[5,4-d]pyrimidine