You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[5-(3-chlorophenyl)-4-(4-chlorophenyl)-1,2,4-triazol-3-yl]sulfanyl]-1-naphthalen-2-ylethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H17Cl2N3OS
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