InChI=1S/C21H20O10/c22-10-3-1-9(2-4-10)14-8-13(23)12-6-5-11(7-15(12)30-14)29-21-18(26)16(24)17(25)19(31-21)20(27)28/h1-7,14,16-19,21-22,24-26H,8H2,(H,27,28)