InChI=1/C19H20N2O4/c22-19(21-23)8-6-14-1-3-16(4-2-14)12-20-10-9-15-5-7-17-18(11-15)25-13-24-17/h1-8,11,20,23H,9-10,12-13H2,(H,21,22)/p+1/b8-6+/fC19H21N2O4/h20-21H/q+1 09A9D2893D563571