Using CC(C)OC(=O)N1CCC(COS(C)(=O)=O)CC1, COC(=O)c1nc(Br)ccc1O to produce COC(=O)c1nc(Br)ccc1OCC1CCN(C(=O)OC(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.