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