Using CCOC(=O)CC(=O)C(C)(C)N1COC(C)=C(c2ccccc2)C1=O, ClC/C=C\CCl to produce CCOC(=O)C1(C(=O)C(C)(C)N2COC(C)=C(c3ccccc3)C2=O)CC=CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.