You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-chloro-N-[1-[2-(5-ethyl-1-methyl-6-oxo-1,2,4-triazin-3-yl)-1,2,4-triazol-3-yl]ethyl]-5-(trifluoromethyl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H17ClF3N7O2
assistant