Using CCOC(=O)COCCOc1ccc(C(=C(CCCl)c2ccccc2)c2ccccc2)cc1 to produce OCCOCCOc1ccc(C(=C(CCCl)c2ccccc2)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.