InChI=1S/C20H24O8S/c1-11-12(2)20(27-19(11)13-5-7-15(21)17(9-13)25-3)14-6-8-16(18(10-14)26-4)28-29(22,23)24/h5-12,19-21H,1-4H3,(H,22,23,24)