Using O=C(NC1CCN(c2ncnc3c2c(Br)cn3S(=O)(=O)c2ccccc2)CC1)c1ccccc1 to produce O=C(NC1CCN(c2ncnc3[nH]cc(Br)c23)CC1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.