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