You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-(2-ethoxyphenyl)-N-methyl-5-oxo-N-piperidin-4-ylpyrrolidine-3-carboxamide is given. What is its corresponding molecular formula?
user
C19H27N3O3
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