Using CO[C@H]1CCC[C@@H](c2cnc(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)cn2)C1 to produce CO[C@H]1CCC[C@@H](c2cnc(N)cn2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.