You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 6-chloro-N-(3-methylphenyl)-2,2-dioxo-4-phenyl-1-prop-2-enyl-2lambda6,1-benzothiazine-3-carboxamide into molecular formula.
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C25H21ClN2O3S
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