You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (5S)-5-ethyl-5-(4-methoxyphenyl)-3-[(4-pyridin-2-ylpiperazin-1-yl)methyl]imidazolidine-2,4-dione ?
user
C22H27N5O3
assistant