2,3-naphthalenedicarboxylic acid, 5-nitro-, dimethyl ester InChI=1/C14H11NO6/c1-20-13(16)10-6-8-4-3-5-12(15(18)19)9(8)7-11(10)14(17)21-2/h3-7H,1-2H dimethyl 5-nitronaphthalene-2,3-dicarboxylate