You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-chloro-1-methyl-5-(4-methylsulfinylphenyl)-N-(1-methyltetrazol-5-yl)-6-oxopyridazine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C15H14ClN7O3S
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