Using COCC1CCCN1N=C1CC(C)(C)C(O)(C=CC(C)=CCO)c2ccccc21 to produce COCC1CCCN1N=C1CC(C)(C)C(O)(C=CC(C)=CC=O)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.