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