You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propyl (6S)-6-(2-chlorophenyl)-3-ethyl-4-methyl-2-oxo-1,6-dihydropyrimidine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21ClN2O3
assistant