You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-[[2-(4-bromo-2-chlorophenoxy)acetyl]-[(4-chlorophenyl)methyl]amino]-N-(2-methylpropyl)-3-phenylpropanamide by IUPAC nomenclature, provide its molecular formula.
user
C28H29BrCl2N2O3
assistant