You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2S)-1-[3-(3-ethoxy-1,2-oxazol-5-yl)propanoyl]pyrrolidin-2-yl]-5-ethyl-4-methyl-1H-pyrimidin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H26N4O4
assistant