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system
Name the molecular formula for the molecule established as 4-chloro-7-(2-chlorophenyl)-3-thia-1,8,11,12-tetrazatricyclo[8.3.0.02,6]trideca-2(6),4,7,10,12-pentaene-13-carboxamide using the IUPAC nomenclature.
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C15H9Cl2N5OS
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