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