InChI=1/C18H18N2O3/c1-12-5-3-4-6-14(12)17(21)19-13-7-8-16-15(11-13)18(22)20(2)9-10-23-16/h3-8,11H,9-10H2,1-2H3,(H,19,21)/f/h19H 9F8BE0F9AF928909