Butanedioic acid,2-sulfo-,1,4-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl) ester,sodium salt (1:1), Sodium 1,4-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl) sulphonatosuccinate, Butanedioic acid,sulfo-,1,4-bis(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl) ester,sodium salt, EINECS 259-407-9, sodium 1,4-dioxo-1,4-bis[(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)oxy]butane-2-sulfonate,