Using CCOc1ccc(-c2nc3ccc([C@@H]4CN(C(=O)OC(C)(C)C)CCO4)cc3o2)cn1 to produce CCOc1ccc(-c2nc3ccc([C@@H]4CNCCO4)cc3o2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.