Using Cc1c(C(C)(C)O)cn2ncc(C#N)c(Nc3ccc(Oc4ccccc4)cc3)c12, CCOCC to produce Cc1c(O)cn2ncc(C#N)c(Nc3ccc(Oc4ccccc4)cc3)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.