You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (4S)-4-(4-chlorophenyl)-2-oxo-6-(pyrrolidin-1-ium-1-ylmethyl)-3,4-dihydro-1H-pyrimidine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21ClN3O3+
assistant