InChI=1/C20H19ClN2O/c21-18-9-5-4-8-17(18)20-23-22-19(24-20)16-12-10-15(11-13-16)14-6-2-1-3-7-14/h1-9,15-16H,10-13H2 8C4B7D257E2F4AB2