You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule [(3R,3aR)-6,6-dimethyl-3-phenyl-3,3a,4,7-tetrahydropyrano[4,3-c]pyrazol-2-yl]-(furan-2-yl)methanone into molecular formula.
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C19H20N2O3
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