Using COc1ccc2[nH]c(C(N)=O)c(S(=O)(=O)N3CCOCC3)c2c1, BrB(Br)Br to produce NC(=O)c1[nH]c2ccc(O)cc2c1S(=O)(=O)N(CCO)CCBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.