Using C=CCN1C[C@H](C)N([C@H](c2ccc(-c3nc(C(=O)OCC)cs3)cc2)c2cccc(O)c2)C[C@H]1C to produce C=CCN1C[C@H](C)N([C@H](c2ccc(-c3nc(C(=O)O)cs3)cc2)c2cccc(O)c2)C[C@H]1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.