InChI=1S/C21H20O10/c22-8-1-3-10-12-7-28-13-6-9(2-4-11(13)18(12)30-14(10)5-8)29-21-17(25)15(23)16(24)19(31-21)20(26)27/h1-6,12,15-19,21-25H,7H2,(H,26,27)