InChI=1S/C24H28O7S/c1-7-23(3,4)19-13-17-12-16-10-11-24(5,6)31-21(16)18(20(17)30-22(19)25)9-8-15(2)14-29-32(26,27)28/h7-8,10-13H,1,9,14H2,2-6H3,(H,26,27,28)/b15-8+