You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(ethoxymethyl)-N-ethyl-N'-[2-(2-hydroxy-3-methoxyphenyl)ethyl]pyrrolidine-1-carboximidamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H31N3O3
assistant