InChI=1/C21H22O10/c22-8-16-18(26)19(27)20(28)21(31-16)29-11-3-1-9(2-4-11)14-7-13(25)17-12(24)5-10(23)6-15(17)30-14/h1-6,14,16,18-24,26-28H,7-8H2