You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Can you give the molecular formula of the molecule 5-methyl-4-oxo-7-[3-[(5-propyl-1,3,4-thiadiazol-2-yl)carbamoyl]azetidin-1-yl]-1-(1,3-thiazol-2-yl)-1,8-naphthyridine-3-carboxylic acid ?
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C22H21N7O4S2
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