1-Butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide350493-08-233 % similar Triflic acid1493-13-632 % similar Trifluoromethanesulfonic anhydride358-23-632 % similar Trifluoromethanesulfonyl chloride421-83-032 % similar 1,1,1-Trifluoromethanesulfonamide421-85-232 % similar