1H,3H-Naphtho[1,8-cd]pyran-1,3-dione, 6-nitro- 4-Nitro-1,8-naphthalic acid anhydride 4-Nitro-1,8-naphthalic anhydride 4-Nitronaphthalene-1,8-dicarboxylic anhydride 4-Nitronaphthalic anhydride 6642-29-1 NSC15356 Naphthalic anhydride, 4-nitro-