5H-Oxireno(4',5')furo(3',2':4,5)furo(2,3-c)xanthen-5-one,8a,9a,10a,10b-tetrahydro-4-hydroxy-6-methoxy-, (8aS-(8aalpha,9abeta,10abeta,10balpha))- 76014-27-2 Sterigmatocystin 1,2-oxide Sterigmatocystin-1,2-epoxide