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