InChI=1S/C21H22O10/c1-8-18(26)19(27)20(28)21(29-8)30-10-5-13(24)17-14(25)7-15(31-16(17)6-10)9-2-3-11(22)12(23)4-9/h2-6,8,15,18-24,26-28H,7H2,1H3