Using COCC1CN(c2ccc([C@H]3CC[C@H](O)CC3)cc2)C(=O)O1, O=C(Cl)c1ccccc1 to produce COCC1CN(c2ccc([C@H]3CC[C@H](OC(=O)c4ccccc4)CC3)cc2)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.