You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 3-[[(2-ethyl-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-6-yl)amino]methyl]-4-fluorobenzonitrile using the IUPAC nomenclature.
user
C16H18FN5
assistant