InChI=1S/C18H14O7/c19-12-5-1-10(2-6-12)9-18(17(23)24)14(15(21)16(22)25-18)11-3-7-13(20)8-4-11/h1-8,19-21H,9H2,(H,23,24)/p-1/t18-/m0/s1