InChI=1S/C20H17FO3S.Na/c1-12-17(9-13-3-6-15(7-4-13)25(2)24)16-8-5-14(21)10-19(16)18(12)11-20(22)23;/h3-10H,11H2,1-2H3,(H,22,23);/q;+1/p-1/b17-9-;