InChI=1S/C20H32O9/c1-2-3-4-5-6-7-8-10-13(11-9-12-14(21)22)28-20-17(25)15(23)16(24)18(29-20)19(26)27/h6-8,10,13,15-18,20,23-25H,2-5,9,11-12H2,1H3,(H,21,22)(H,26,27)/b7-6-,10-8?