InChI=1S/C21H22O9/c22-13-5-1-3-11(9-13)7-8-15(23)12-4-2-6-14(10-12)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)