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