You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3,5-dimethoxyphenyl)-4-[3-(4-phenylmethoxyphenyl)-1,2,4-oxadiazol-5-yl]pyrrolidin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H25N3O5
assistant