You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[(4-bromophenyl)methyl-[2-[4-chloro-N-(4-methylphenyl)sulfonyl-3-(trifluoromethyl)anilino]acetyl]amino]-N-ethylpropanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H28BrClF3N3O4S
assistant