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-[4-[3-(4-fluorophenyl)-2,5-dimethylindol-1-yl]piperidin-1-yl]ethyl]imidazolidin-2-one .
user
C26H31FN4O
assistant