Using O=Cc1c[nH]c2ncc(Br)nc12, C[Si](C)(C)CCOCCl to produce C[Si](C)(C)CCOCn1cc(C=O)c2nc(Br)cnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.