Using CNc1nccs1, CC(C)(C)OC(=O)N1CCC(CCBr)CC1 to produce C/N=c1\sccn1CCC1CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.