Using CC(=O)[O-], CCOC(=O)C1=C(C)NC(C)=C(C(=O)OCC)C1c1ccccc1S(C)=O to produce CCOC(=O)C1=C(C)NC(C)=C(C(=O)OCC)C1c1ccccc1SCOC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.