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What is the molecular formula of the molecule 4-bromo-N,N,9-trimethyl-10-(4-methylphenyl)-11-sulfanylidene-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxamide ?
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C21H22BrN3O2S
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