You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[4-[(7-chloroquinolin-8-yl)methyl]-1,4-diazepan-1-yl]-2-methylpropan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C19H24ClN3O
assistant