You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(4-ethyl-5-sulfanylidene-1H-1,2,4-triazol-3-yl)methyl]-3-[(4-methylphenyl)sulfamoyl]benzamide into its molecular formula.
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C19H21N5O3S2
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