InChI=1S/C18H18O10/c1-17-13(22)6-4-3-5-7(8(6)14(23)18(17,2)28-17)26-16-11(21)9(19)10(20)12(27-16)15(24)25/h3-5,9-12,16,19-21H,1-2H3,(H,24,25)