InChI=1S/C20H32O8S/c1-2-3-5-8-16(28-29(25,26)27)13-11-15-12-14-18(22)20(15)17(21)9-6-4-7-10-19(23)24/h11,13,16-17,21H,2-10,12,14H2,1H3,(H,23,24)(H,25,26,27)/b13-11+