You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[[4-(3-bromophenyl)oxan-4-yl]methyl]-3-(3-ethyl-2-oxobenzimidazol-1-yl)propanamide into molecular formula.
user
C24H28BrN3O3
assistant