Using CCC(CC)c1cc(C)nn2c(-c3sc(I)cc3OC)c(C)nc12, Cn1ncnc1Br to produce CCC(CC)c1cc(C)nn2c(-c3sc(-c4ncnn4C)cc3OC)c(C)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.