You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-[6-[2-[2-[(2S)-1-(2-ethylbenzoyl)pyrrolidin-2-yl]-3H-benzimidazol-5-yl]ethynyl]-1H-benzimidazol-2-yl]pyrrolidin-1-yl]-[(2S)-oxolan-2-yl]methanone by IUPAC nomenclature, provide its molecular formula.
user
C38H38N6O3
assistant