You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(2,3-dihydro-1H-inden-5-yl)-N-[[4-(dimethylcarbamoyl)phenyl]methyl]-N-ethyl-5-oxopyrrolidine-3-carboxamide .
user
C26H31N3O3
assistant