You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[1-(2-methoxyphenyl)tetrazol-5-yl]sulfanylmethyl]-N,N-dimethyl-1-propylbenzimidazole-5-sulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C21H25N7O3S2
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