Using COc1cc2c(cc1OC)CCC(C(=O)Nc1ccccc1C(=O)O)=C2 to produce COc1cc2c(cc1OC)CC(C(=O)Nc1ccccc1C(=O)O)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.