You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-(4-methyl-2-methylsulfanyl-6-oxo-1H-pyrimidin-5-yl)-N-[(1S)-1-(4-methylsulfonylphenyl)ethyl]propanamide .
user
C18H23N3O4S2
assistant