Using CC(C)(C)c1ccc(C=O)cc1, CCN(CCN)c1cccc(C)c1 to produce CCN(CCNCc1ccc(C(C)(C)C)cc1)c1cccc(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.