You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S,4S)-N-ethyl-4-[(2-methoxyacetyl)amino]-1-[(1-methylbenzimidazol-2-yl)methyl]pyrrolidine-2-carboxamide .
user
C19H27N5O3
assistant