Using COc1ccc(COC(C)(C)COc2cnc(NC(=O)OC(C)(C)C)cn2)cc1 to produce COc1ccc(COC(C)(C)COc2cnc(N)cn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.