Methanesulfonic acid, 1,1,1-trifluoro-, 2,2,2-trifluoroethyl ester; 2,2,2-Trifluoroethyl trifluoromethylsulfonate; Trifluoro(trifluoromethanesulfonylmethoxy)methane; 2,2,2-Tris(fluoranyl)ethyltris(fluoranyl)methanesulfonate