56347-81-0

3,6,9,10,13,16-Hexaoxaoctadecane-1,18-disulfonyl difluoride,1,1,2,2,4,5,5,7,12,14,14,15,17,17,18,18-hexadecafluoro-8,11-dioxo-4,7,12,15-tetrakis(trifluoromethyl)-