fluorosulfuric acid 1,3,4,4,4-pentafluoro-2-oxo-1,3-bis-trifluoromethyl-butyl ester

4,5-difluoro-4-(perfluoropropan-2-yl)-5-(trifluoromethyl)-1,3,2-dioxathiolane 2,2-dioxide

fluorosulfuric acid 1,2,3,3,3-pentafluoro-1-trifluoroacetyl-2-trifluoromethyl-propyl ester