Using COc1cc(-c2nn(C(C)C)c3ncnc(N)c23)ccc1NC(=O)OC(C)(C)C to produce CC(C)n1nc(-c2ccc(N)c(O)c2)c2c(N)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.