You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(1H-benzimidazol-2-yl)-1-[(2S)-2-[4-(4-fluorophenyl)-6-methylpyridin-2-yl]pyrrolidin-1-yl]propan-1-one into its molecular formula.
user
C26H25FN4O
assistant