You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[3-chloro-5-(morpholine-4-carbonyl)pyridin-2-yl]-1,4-diazepan-1-yl]-cyclopropylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25ClN4O3
assistant