Using CCOC(=O)C(N)C(C)c1c[nH]c2cccc(OC(C)C)c12, O=CC(=O)O to produce CCOC(=O)C1NC(C(=O)O)c2[nH]c3cccc(OC(C)C)c3c2C1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.