You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[[(2R)-1-ethylpyrrolidin-2-yl]methyl]-1-methyl-4H-chromeno[4,3-c]pyrazole-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C19H24N4O2
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