InChI=1S/C21H22O9/c22-13-5-2-4-12(10-13)15(23)8-7-11-3-1-6-14(9-11)29-21-18(26)16(24)17(25)19(30-21)20(27)28/h1-6,9-10,16-19,21-22,24-26H,7-8H2,(H,27,28)