Using COc1ncc(C(=O)c2cn(C(C)C)c3ccncc23)cc1N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C to produce COc1ncc(C(=O)c2cn(C(C)C)c3ccncc23)cc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.