Using COC(=O)c1ncsc1CBr, CC(C)(C)OC(=O)N1CC(N)C1 to produce COC(=O)c1ncsc1CNC1CN(C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.