You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-1-[2-(1H-benzimidazol-2-yl)pyrrolidin-1-yl]-3-(3-propan-2-yloxyphenyl)prop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25N3O2
assistant