Using C1=COCCC1, Clc1ccc(Cc2nc(Br)sc2-c2nnc[nH]2)cc1 to produce Clc1ccc(Cc2nc(Br)sc2-c2ncn(C3CCCCO3)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.