InChI=1S/C21H28O10/c1-7-4-5-9-11(7)16-12(8(2)19(28)29-16)10(22)6-21(9,3)31-20-15(25)13(23)14(24)17(30-20)18(26)27/h4,9-17,20,22-25H,2,5-6H2,1,3H3,(H,26,27)