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 (6Z)-6-[[4-[(2-fluorophenyl)methoxy]phenyl]methylidene]-5-imino-2-(2-methylpropyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one into molecular formula.
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C23H21FN4O2S
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