InChI=1S/C21H20O10/c22-12-6-10(30-21-18(26)16(24)17(25)19(31-21)20(27)28)7-13-14(12)15(23)11(8-29-13)9-4-2-1-3-5-9/h1-7,11,16-19,21-22,24-26H,8H2,(H,27,28)