InChI=1S/C20H24O8S/c1-13(2)17(28-29(22,23)24)7-5-14(3)9-10-26-18-11-15(25-4)12-19-16(18)6-8-20(21)27-19/h6,8-9,11-12,17H,1,5,7,10H2,2-4H3,(H,22,23,24)