You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[2-(4-methoxy-2-methylsulfonylphenyl)prop-1-enyl]-4-methyl-4,5-dihydro-1H-pyridazin-6-one ?
user
C16H20N2O4S
assistant