InChI=1/C17H20N2O2/c20-17-19-14-8-13(1-2-15(14)21-17)18-16-11-4-9-3-10(6-11)7-12(16)5-9/h1-2,8-12,16,18H,3-7H2,(H,19,20)/f/h19H F83F3763BBD6C17E