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