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