You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[6-[(1,1-dioxothiolan-3-yl)-ethylamino]pyridazin-3-yl]-2-(2-methylphenyl)acetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H24N4O3S
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