[2,3-bis(methylsulfonyloxy)phenyl] methanesulfonate;(2,6-dinitrophenyl)methyl (4-methylphenyl) sulfite;(2,6-dinitrophenyl)methyl [2-(trifluoromethyl)phenyl] sulfite;(2,6-dinitrophenyl)methyl [3-(trifluoromethyl)phenyl] sulfite;(2,6-dinitrophenyl)methyl [4-(trifluoromethyl)phenyl] sulfite;(4-methylphenyl) (4-methylphenyl)methyl sulfite;(4-methylphenyl) (2-nitrophenyl)methyl sulfite;(4-methylphenyl) (2-oxo-1,2-diphenylethyl) sulfite;(2-nitrophenyl)methyl N-cyclohexylcarbamate