You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2S)-3-(furan-2-carbonyl)-4-hydroxy-1-(3-imidazol-1-ylpropyl)-2-pyridin-3-yl-2H-pyrrol-5-one into its molecular formula.
user
C20H18N4O4
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