You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(1,5-dimethylpyrrol-2-yl)-1-(2-methoxyethyl)-4-pyridin-2-ylimidazolidine-2-thione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H22N4OS
assistant