InChI=1/C20H20Cl2O3/c21-15-9-14(8-13-4-2-1-3-5-13)18(19(22)10-15)7-6-17-11-16(23)12-20(24)25-17/h1-5,9-10,16-17,23H,6-8,11-12H2/t16-,17-/m1/s1 B46A2597AAE2E711