Using CC(C)C[C@H]1CNCCN1C(=O)OC(C)(C)C, Cc1sc(Br)nc1Br to produce Cc1sc(N2CCN(C(=O)OC(C)(C)C)[C@@H](CC(C)C)C2)nc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.