Using CNC, CCC(CC)c1cc(C)nn2c(-c3nc(Br)oc3Br)c(C)nc12 to produce CCC(CC)c1cc(C)nn2c(-c3nc(N(C)C)oc3Br)c(C)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.