Using NC[C@H](O)C(=O)O, COC(=O)c1ncc2cc(Oc3ccccc3)ccc2c1O to produce O=C(NC[C@H](O)C(=O)O)c1ncc2cc(Oc3ccccc3)ccc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.