Using CC(=O)[O-], CCOC(=O)C#Cc1cccc(Cl)c1C1(C(=O)OCC)CCOCC1 to produce CCOC(=O)/C=C(\O)c1cccc(Cl)c1C1(C(=O)OCC)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.