You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule propan-2-yl 2-[2-[1-(4-ethylphenyl)-5-oxopyrrolidin-3-yl]benzimidazol-1-yl]acetate into molecular formula.
user
C24H27N3O3
assistant