Using O=C(NCC[C@H](O)C(=O)O)OCc1ccccc1, O=C(Cl)c1ccccc1 to produce O=C(NCC[C@H](OC(=O)c1ccccc1)C(=O)O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.