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 3-cyclobutyl-4-[(E)-1-phenylprop-1-en-2-yl]-1,2,3,3a,4,5,7,7a-octahydropyrazolo[3,4-b]pyridin-6-one is given. What is its corresponding molecular formula?
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C19H25N3O
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