Using CN(Cc1ccccc1)[C@@H](CCCNC(=O)OC(C)(C)C)C(=O)NCCc1ccc(O)cc1 to produce CN[C@@H](CCCNC(=O)OC(C)(C)C)C(=O)NCCc1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.