You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[(4-bromophenyl)methyl-[2-(3-chloro-N-(4-chlorophenyl)sulfonylanilino)acetyl]amino]-3-phenyl-N-propan-2-ylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H32BrCl2N3O4S
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