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 N-(6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazol-3-ylmethyl)-N'-methyl-2-oxa-7-azaspiro[4.4]nonane-7-carboximidamide into molecular formula.
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C15H24N6O
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