You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [7-(2-methyl-3H-benzimidazol-5-yl)-3,5-dihydro-2H-1,4-benzoxazepin-4-yl]-(1-methyl-4-pyrrolidin-1-ylsulfonylpyrrol-2-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C27H29N5O4S
assistant