InChI=1/C18H18N2O3/c1-13-5-3-4-6-16(13)17(21)9-7-14-11-15(20(2)12-14)8-10-18(22)19-23/h3-12,23H,1-2H3,(H,19,22)/b9-7+,10-8+/f/h19H 2FF4DB36E7E1D5F7