InChI=1S/C21H22O8/c22-14(9-12-5-2-1-3-6-12)10-13-7-4-8-15(11-13)28-21-18(25)16(23)17(24)19(29-21)20(26)27/h1-8,11,16-19,21,23-25H,9-10H2,(H,26,27)