1a,6b,7a,12a-Tetrahydrodibenz(3,4:7,8)anthra(1,2-b:5,6-b')bisoxirene Dibenz(3,4:7,8)anthra(1,2-b:5,6-b')bisoxirene, 1a,6b,7a,12a-tetrahydro- Dibenz(a,h)anthracene-5,6:12,13-diepoxide HN2116000