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