You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3S,4R)-3-hydroxy-4-(quinolin-2-ylmethyl)pyrrolidin-1-yl]-2-(1H-imidazol-5-yl)ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O2
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