2-(4-(methylsulfonyl)-2-nitrobenzoyl)cyclohexane-1,3-dione; 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione; 2-(4-Mesyl-2-nitrobenzoyl)-1,3-cyclohexanedione; 2-(2-nitro-4-methanesulphonyl benzoyl)cyclohexan-1,3-dione; 1,3-Cyclohexanedione, 2-4-(methylsulfonyl)-2-nitrobenzoyl-; 2-(2'-nitro-4'-methylsulphonylbenzoyl)-1,3-cyclohexanedione; 2-(4-methylsulfonyl-2-nitro-phenyl)carbonylcyclohexane-1,3-dione; 2-[(4-methylsulfonyl-2-nitrophenyl)-oxomethyl]cyclohexane-1,3-dione