You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 1-methyl-4-[[(4R)-2-oxo-3,4-dihydro-1H-quinoline-4-carbonyl]amino]pyrrole-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
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C18H19N3O4
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