methyl 4-nitro-2-(4-(4,4,5,5-tetramethyl-1,3,2-dio
1-(4-bromo-3-nitrophenyl)-4-(4,4,5,5-tetramethyl-1
1-(4-methoxy-3-nitrophenyl)-4-(4,4,5,5-tetramethyl
1-(4-methyl-3-nitrophenyl)-4-(4,4,5,5-tetramethyl-
1-(2-methoxy-5-nitrophenyl)-4-(4,4,5,5-tetramethyl
1-(2-methyl-3-nitrophenyl)-4-(4,4,5,5-tetramethyl-
1-(2-methyl-5-nitrophenyl)-4-(4,4,5,5-tetramethyl-
1-(3-fluoro-5-nitrophenyl)-4-(4,4,5,5-tetramethyl-
1-(4-chloro-2-nitrophenyl)-4-(4,4,5,5-tetramethyl-
methyl 3-nitro-4-(4-(4,4,5,5-tetramethyl-1,3,2-dio
1-(4-fluoro-2-nitrophenyl)-4-(4,4,5,5-tetramethyl-
1-(4-bromo-2-nitrophenyl)-4-(4,4,5,5-tetramethyl-1