You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(3-chloro-2-methoxyphenyl)-1-[dichloro-[5-(3-chloro-2-methoxyphenyl)tetrazol-1-yl]methyl]tetrazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H12Cl4N8O2
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