You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(6-carbamoylpyridin-3-yl)-4-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C19H19N7O2S
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