Using CCOC(=O)C=C1CCCc2c1cnn2-c1ccc(Cl)c(Cl)c1 to produce CCOC(=O)CC1CCCc2c1cnn2-c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.