You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 4,5,6,7-tetrahydro-[1,2]oxazolo[5,4-c]pyridin-6-ium-3-one;dichloride is given. What is its corresponding molecular formula?
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C12H18Cl2N4O4
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