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 2-(2,7-diazaspiro[4.4]nonan-2-yl)-N-(5-methyl-1,2-oxazol-3-yl)acetamide;hydrochloride into molecular formula.
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C13H21ClN4O2
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