Using COCCOc1nc(N)c2nc(OC)n(CCC3CCN(Cc4ccc(CO)cc4)CC3)c2n1 to produce COCCOc1nc(N)c2nc(OC)n(CCC3CCN(Cc4ccc(C=O)cc4)CC3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.