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 6,8-dihydro-5H-imidazo[1,2-a]pyrazin-7-yl-[(2R,3S)-2-methylmorpholin-3-yl]methanone into molecular formula.
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C12H18N4O2
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