Using CCCBr, CCCNc1nc(C)nc2c(-c3c(C)cc(C)cc3C)n(C)nc12 to produce CCCN(CCC)c1nc(C)nc2c(-c3c(C)cc(C)cc3C)n(C)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.