InChI=1/C18H19ClN2O7/c1-9-11(16(22)26-3)5-10(28-9)8-20-18(24)21-14-7-15(25-2)12(6-13(14)19)17(23)27-4/h5-7H,8H2,1-4H3,(H2,20,21,24)/f/h20-21H 6605D374CD8F5B4F