1H,3H-Naphtho[1,8-cd]pyran-1,3-dione, 6,7-dinitro- 3807-78-1 4,5-Dinitro-1,8-naphthalenedicarboxylic anhydride 4,5-Dinitronaphthalic anhydride NSC144446 Naphthalic anhydride, 4,5-dinitro-