37496-00-7 5-17-02-00435 (Beilstein Handbook Reference) 8b,9a-Dihydropyreno(4,5-b)oxirene BRN 1347050 CCRIS 3847 Pyrene 4,5-epoxide Pyrene 4,5-oxide Pyrene-4,5-oxide Pyreno(4,5-b)oxirene, 8b,9a-dihydro-