You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N'-[[1-(cyclohexylmethyl)pyrrolidin-2-yl]methyl]-N-ethyl-3-(methoxymethyl)pyrrolidine-1-carboximidamide into its molecular formula.
user
C21H40N4O
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