InChI=1S/C20H24O7S/c1-26-19(14-10-16-7-11-17(21)12-8-16)20(27-28(23,24)25)18(22)13-9-15-5-3-2-4-6-15/h2-8,11-12,19-21H,9-10,13-14H2,1H3,(H,23,24,25)