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