Using C[Si](C)(C)CCOCCl, Oc1nncn1-c1ccc(Br)cc1 to produce C[Si](C)(C)CCOCn1ncn(-c2ccc(Br)cc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.