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 2-(2-formyl-6,8-dihydro-5H-imidazo[1,2-a]pyrazin-7-yl)pyrimidine-5-carboxylic acid is given. What is its corresponding molecular formula?
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C12H11N5O3
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