You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-[[1-(2,6-dimethylphenyl)tetrazol-5-yl]sulfanylmethyl]-8-thia-4,6-diazatricyclo[7.5.0.02,7]tetradeca-1(9),2,4,6-tetraen-3-amine by IUPAC nomenclature, provide its molecular formula.
user
C21H23N7S2
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