Using COc1ccc(OC)c(C(=O)Cl)c1F, CCOC(=O)Cc1cccc(OC)c1 to produce CCOC(=O)C(C(=O)c1c(OC)ccc(OC)c1F)c1cccc(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.