You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(4,6-dimethylpyrimidin-2-yl)sulfanyl-4-oxonaphthalen-1-ylidene]-4-methylbenzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H19N3O3S2
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