You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-methyl-3-[(5-phenyl-1,2-oxazol-3-yl)methyl]-5-(4-propylphenyl)imidazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H23N3O3
assistant