InChI=1S/C20H32O8/c1-2-3-4-5-6-7-8-9-10-11-12-13-14(21)27-20-17(24)15(22)16(23)18(28-20)19(25)26/h6-7,9-10,15-18,20,22-24H,2-5,8,11-13H2,1H3,(H,25,26)/b7-6-,10-9-