You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-ethyl-5-methyl-3-[2-[5-(3-methylpyridin-4-yl)-2-propylpyrimidin-4-yl]pyrrolidine-1-carbonyl]-1H-pyridin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31N5O2
assistant