Using CSC(=Nc1nc2ncc(Br)nc2s1)SC, NC[C@]1(O)CN2CCC1CC2 to produce Brc1cnc2nc(NC3=NC[C@@]4(CN5CCC4CC5)O3)sc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.