6b,7a-Dihydrobenz(1,10)acephenanthryleno(4,5-b)oxirene 73473-54-8 BRN 3616512 Benz(1,10)acephenanthryleno(4,5-b)oxirene, 6b,7a-dihydro- Cyclopenta(cd)pyrene 3,4-oxide Cyclopenta(cd)pyrene, 3,4-dihydro-3,4-epoxy- Cyclopenta(cd)pyrene-3,4-oxide