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