Using C[Si](C)(C)CCOCCl, O=Cc1n[nH]c2ccc(Br)cc12 to produce C[Si](C)(C)CCOCn1nc(C=O)c2cc(Br)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.