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