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