InChI=1/C20H20Cl2N2O4/c21-13-8-12(9-14(22)10-13)11-28-16-6-4-15(5-7-16)23-19(25)17-2-1-3-18(17)20(26)24-27/h4-10,17-18,27H,1-3,11H2,(H,23,25)(H,24,26)/t17-,18-/m0/s1/f/h23-24H 2F2BA6F26B470D20