InChI=1S/C21H24O10/c22-9-16-18(27)19(28)20(29)21(31-16)30-15(7-10-1-3-11(23)4-2-10)17(26)13-6-5-12(24)8-14(13)25/h1-6,8,15-16,18-25,27-29H,7,9H2/t15?,16-,18-,19+,20-,21-/m1/s1