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