InChI=1S/C21H21ClN2O9/c1-24(2)13-6-5-7-14(26)10-8(22)3-4-9(25)11(10)16(28)21(7,33)19(31)20(6,32)17(29)12(15(13)27)18(23)30/h3-4,6-7,13-14,25-27,32-33H,5H2,1-2H3,(H2,23,30)/t6?,7?,13?,14?,20-,21?/m1/s1