Using C[Si](C)(C)CCOCCl, CC1(c2nc(Br)c(Br)[nH]2)CC1 to produce CC1(c2nc(Br)c(Br)n2COCC[Si](C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.