You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[4-[4-[[5-(methoxymethyl)-1H-1,2,4-triazol-3-yl]methylsulfamoyl]phenyl]phenyl]acetamide into molecular formula.
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C19H21N5O4S
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