Using COC(=O)C=Cc1ccc(OCC2CN(c3ccccc3)C(=O)O2)cc1 to produce COC(=O)CCc1ccc(OCC2CN(c3ccccc3)C(=O)O2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.