Using COC(=O)[C@H](CC(C)C)NCl, CC(=O)N[C@@H](CC(C)C)C(=O)O to produce COC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.