You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N'-(2,2-dimethyl-4-methylsulfonylbutyl)-N-ethyl-3-phenylpyrrolidine-1-carboximidamide using the IUPAC nomenclature.
user
C20H33N3O2S
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