You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(furan-2-yl)-1-[(6R)-6-(pyridin-3-yloxymethyl)-5,6,7,9-tetrahydroimidazo[1,5-a][1,4]diazepin-8-yl]ethanone into its molecular formula.
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C19H20N4O3
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