You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxyethyl (4S)-4-(3-chloro-5-ethoxy-4-hydroxyphenyl)-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21ClN2O5S
assistant