Using Clc1nc(N2CCOCC2)c2nc(CCCCBr)n(C3CCCCO3)c2n1 to produce Clc1nc(N2CCOCC2)c2nc(CCCCBr)[nH]c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.