Using CC(=O)SCCBr, CC(C)(C)OC(=O)C1CCCN2C(=O)CC(=O)N12 to produce CC(=O)SCC1(CSC(C)=O)C(=O)N2CCCC(C(=O)OC(C)(C)C)N2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.