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