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Novel compounds, (3,6-dichloro-2-nitrophenyl)(3-nitrophenyl)methanone(2), (2-amino-3,6-dichloro- phenyl)(3-aminophenyl)methanone(3) and 1-[3-(2-amino-3,6-dichlorobenzoyl)phenyl]-1H-pyrrole-2,5-dione(4), were synthesized from the initial compound 2,5-dichl