You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(azepan-2-yl)-8-chloro-6-(trifluoromethyl)-[1,2,4]triazolo[4,3-a]pyridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H14ClF3N4
assistant