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