Using Cn1c(Br)nc2c(N3CCC(n4c(=O)[nH]c5ccccc54)CC3)ncnc21, c1c[nH]cn1 to produce Cn1c(-n2ccnc2)nc2c(N3CCC(n4c(=O)[nH]c5ccccc54)CC3)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.