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 1-N-[4-(aminomethyl)-1-oxothian-1-ylidene]-3-N-methyl-3-N-phenylbenzene-1,3-dicarboxamide into molecular formula.
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C21H25N3O3S
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