Using CCOC(=O)[C@@H](CCC(=O)c1ccc(Cl)cc1)NC(=O)OC(C)(C)C to produce CCOC(=O)[C@H]1CCC(c2ccc(Cl)cc2)=N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.