4-(Trifluoromethoxy)benzylsulphonyl chloride[4-(trifluoromethoxy)phenyl]methanesulfonyl chloride[4-(Trifluoromethoxy)phenyl]methylsulphonyl chloride4-(Chlorosulphonyl)-alpha,alpha,alpha-trifluoroanisole4-(Trifluoromethoxy)phenylmethanesulfonyl chloride