Using Cc1cccc(CCBr)c1, CC1CNCCC1(C)c1cccc(-c2c[nH]nn2)c1 to produce Cc1cccc(CCN2CCC(C)(c3cccc(-c4c[nH]nn4)c3)C(C)C2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.