You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4aR,7aS)-4-[(3,5-dimethyl-1,2-oxazol-4-yl)methyl]-3,4a,5,6,7,7a-hexahydro-2H-pyrrolo[3,4-b][1,4]oxazine;dihydrochloride .
user
C12H21Cl2N3O2
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