You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-ethylphenyl)-3-[[5-[(3-methoxyphenyl)methylsulfanyl]-4-(4-nitrophenyl)-1,2,4-triazol-3-yl]methyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26N6O4S
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