InChI=1S/C21H26O10/c1-21(2,31-20-17(25)15(23)16(24)18(30-20)19(26)27)7-6-11-8-10-4-5-14(22)29-13(10)9-12(11)28-3/h4-5,8-9,15-18,20,23-25H,6-7H2,1-3H3,(H,26,27)