InChI=1S/C21H21ClN2O9/c1-24(2)16-15(28)12(19(23)31)18(30)21(33)17(29)9-6(5-20(16,21)32)13(26)10-7(22)3-4-8(25)11(10)14(9)27/h3-4,6,12-13,16,25-26,29,32-33H,5H2,1-2H3,(H2,23,31)/t6?,12?,13?,16?,20?,21-/m0/s1