Using CN1C(=O)COc2nc(-c3ccc(C4(NC(=O)OC(C)(C)C)CC4)cc3)c(-c3ccccc3)cc21 to produce CN1C(=O)COc2nc(-c3ccc(C4(N)CC4)cc3)c(-c3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.