You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-[(4-chloro-2-ethyl-5-methylpyrazol-3-yl)methyl]azepan-2-yl]propan-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H26ClN3O
assistant