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-(2,5-dimethoxyphenyl)-5-propyl-3-thiophen-2-yl-2,4-dihydropyrrolo[3,4-c]pyrazol-6-one is given. What is its corresponding molecular formula?
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C20H21N3O3S
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