1-Nitropyrene 9,10-oxide 1-Nitropyrene-9,10-oxide 105596-43-8 8b,9a-Dihydro-1-nitropyreno(4,5-b)oxirene CCRIS 2127 Pyrene, 4,5-dihydro-4,5-epoxy-3-nitro- Pyreno(4,5-b)oxirene, 8b,9a-dihydro-1-nitro-