dimethyl 2-amino-5-(formylamino)benzene-1,4-dicarboxylate

dimethyl 2-amino-5-nitroterephthalate

dimethyl 2-acetamidobenzene-1,4-dicarboxylate

dimethyl-2-acetamido-5-nitroterephthalate

dimethyl 2,5-diaminocyclohexa-1,4-diene-1,4-dicarboxylate