You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-N-ethyl-3-hydroxy-N'-[[1-(2-methoxyphenyl)pyrrolidin-3-yl]methyl]pyrrolidine-1-carboximidamide;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H31IN4O2
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