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