You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[2-(3-methoxy-4-prop-2-enylsulfonylphenyl)ethenyl]-4-methyl-4,5-dihydro-1H-pyridazin-6-one into its molecular formula.
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C17H20N2O4S
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