Using CCC1=C(C(=O)OC)C(c2ccc(Cl)cc2)C(C(=O)OC)=C(CC)N1 to produce CCC1=C(C(=O)OC)C(c2ccc(Cl)cc2)C2=C(N1)C(C)OC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.