Using CCCCCCC=C[C@H]1C(=CCCCCCC(=O)OC)C(=O)C2=C1O2, Cl to produce CCCCCCC=C[C@H]1CC(Cl)C(=O)C1=CCCCCCC(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.