InChI=1S/C20H32O8S/c1-2-3-6-9-15(21)12-13-17-16(10-7-4-5-8-11-20(23)24)18(22)14-19(17)28-29(25,26)27/h4,7,16-17,19H,2-3,5-6,8-14H2,1H3,(H,23,24)(H,25,26,27)/b7-4-