You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(2,5-dichlorophenyl)sulfanyl-N-[4-(5-oxo-1H-tetrazol-4-yl)phenyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C15H11Cl2N5O2S
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