InChI=1S/C18H23F3N2O3/c1-11(2)9-15(22-12(3)24)17(26)23-14(16(25)18(19,20)21)10-13-7-5-4-6-8-13/h4-8,11,14-15H,9-10H2,1-3H3,(H,22,24)(H,23,26)/t14-,15-/m0/s1