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