Using CCCC[Sn](Cl)(CCCC)CCCC, CC[Si](CC)(CC)OC(C)(C)c1ccn2c(Br)cnc2n1 to produce CCCC[Sn](CCCC)(CCCC)c1cnc2nc(C(C)(C)O[Si](CC)(CC)CC)ccn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.