InChI=1S/C18H13ClO8/c19-7-1-2-8(20)13-12(7)14(23)5-3-6-15(24)9(21)4-10(22)18(6,27)17(26)11(5)16(13)25/h1-2,5-6,11,14,20,23,27H,3-4H2/t5?,6?,11?,14?,18-/m1/s1