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 methyl (3aS,6aS)-5-(3,4-dimethylphenyl)-1-nitroso-4,6-dioxo-3a,6a-dihydropyrrolo[3,4-c]pyrazole-3-carboxylate is given. What is its corresponding molecular formula?
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C15H14N4O5
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