InChI=1S/C18H16O14/c19-3-5-1-7(21)9(23)14(29-5)16-13(8(22)2-6(4-20)30-16)31-18-12(26)10(24)11(25)15(32-18)17(27)28/h1-3,10-12,15,18,20,23-26H,4H2,(H,27,28)