Using C[C@@H](C(=O)NC1CS(=O)(=O)c2ccccc2N(Cc2ccccc2)C1=O)N(C)C(=O)OC(C)(C)C to produce CN[C@@H](C)C(=O)NC1CS(=O)(=O)c2ccccc2N(Cc2ccccc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.