1-Nitropyrene 4,5-oxide 1-Nitropyrene-4,5-oxide 105596-42-7 8b,9a-Dihydro-3-nitropyreno(4,5-b)oxirene CCRIS 2126 Pyrene, 4,5-dihydro-4,5-epoxy-1-nitro- Pyreno(4,5-b)oxirene, 8b,9a-dihydro-3-nitro-