InChI=1/C20H20N2O3/c23-20(22-24)10-9-15-5-7-16(8-6-15)13-21-12-11-17-14-25-19-4-2-1-3-18(17)19/h1-10,14,21,24H,11-13H2,(H,22,23)/b10-9+/f/h22H 6625A6C6EC99E34E