InChI=1S/C17H17FN2O2/c1-12(17(19)21)20-10-13-5-7-16(8-6-13)22-11-14-3-2-4-15(18)9-14/h2-10,12H,11H2,1H3,(H2,19,21)/b20-10+/t12-/m0/s1