2,4-diamino-5,6,7,8-tetrahydropteridine

2,4-二氯-5,6,7,8-四氢蝶啶

5,8-二氢-1H-蝶啶-2,4,6,7-四酮

2,4,6,7-四氯蝶啶

N2-acetylpterin