for the following products
(4-Amino-3-nitrophenyl)(4-fluorophenyl)methanone | (4-Chloro-3-nitrophenyl)(4-fluoro phenyl)methanone | 3-Nitro-4-chloro-4'-fluorobenzophenone | 4-Chloro-4'-fluoro-3-nitrobenzophenone and 4-Chloro-3-nitro-4'-fluorobenzophenone
