2,3-Dihydro-2,3-(N(5)-formyl-2',5',6'-triamino-4-oxo-N(5)-pyrimidyl)-3-hydroxyaflatoxin B(1) 83953-67-7 Afb1-fapyr Formamide, N-(2,4-diamino-1,4,5,6-tetrahydro-6-oxo-5-pyrimidinyl)-N-(1,2,3,6a,8,9,9a,11-octahydro-9-hydroxy-4-methoxy-1,11-dioxocyclopenta(c)furo(3',2':4,5)furo(2,3-h)(1)benzopyran-8-yl)-