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