InChI=1S/C19H20N2O3/c22-18(21-15-4-3-9-20-13-15)19(7-1-2-8-19)14-5-6-16-17(12-14)24-11-10-23-16/h3-6,9,12-13H,1-2,7-8,10-11H2,(H,21,22)