Using C[O-], CCC(NC(C)C)C(O)c1ccc(O)c2[nH]c(=O)ccc12 to produce CCC(NC(C)C)C(O)c1ccc(OC(=O)c2ccc(C)cc2)c2[nH]c(=O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.