InChI=1S/C20H18O10/c21-10-3-1-2-8(6-10)12-7-9-4-5-11(13(22)17(9)28-12)29-20-16(25)14(23)15(24)18(30-20)19(26)27/h1-7,14-16,18,20-25H,(H,26,27)