Using COc1cc(-c2cn(C3CCC4(CC3)OCCO4)c3ncnc(N)c23)ccc1N to produce COc1cc(-c2cn(C3CCC(=O)CC3)c3ncnc(N)c23)ccc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.