You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-N-ethyl-6-methoxy-N-[2-(4-methyl-1H-benzimidazol-2-yl)ethyl]-3,4-dihydro-2H-chromene-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H27N3O3
assistant