You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-2-yl-(4-aminooxolan-3-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C12H21N3O2
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