InChI=1S/C21H24O9/c22-10-16-18(26)19(27)20(28)21(30-16)29-12-8-14(24)17(15(25)9-12)13(23)7-6-11-4-2-1-3-5-11/h1-5,8-9,16,18-22,24-28H,6-7,10H2