InChI=1S/C21H24O10/c1-5-21(2,3)10-8-9-6-7-11(16(28-4)15(9)30-19(10)27)29-20-14(24)12(22)13(23)17(31-20)18(25)26/h5-8,12-14,17,20,22-24H,1H2,2-4H3,(H,25,26)