InChI=1S/C20H24O8S/c1-11-6-13-8-19(27-3)17(22)9-14(13)20(15(11)10-28-29(23,24)25)12-4-5-16(21)18(7-12)26-2/h4-5,7-9,11,15,20-22H,6,10H2,1-3H3,(H,23,24,25)