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What is the molecular formula of the compound with this IUPAC name (1R,9R,13R)-N-(4-chlorophenyl)-9-methyl-11-sulfanylidene-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxamide ?
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C18H16ClN3O2S
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