You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(ethylsulfamoyl)-N-[3-(5-methyl-1H-1,2,4-triazol-3-yl)phenyl]benzamide by IUPAC nomenclature, provide its molecular formula.
user
C18H19N5O3S
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