Using C[Si](C)(C)CCOCCl, Clc1c(Br)cnc2[nH]cc(I)c12 to produce C[Si](C)(C)CCOCn1cc(I)c2c(Cl)c(Br)cnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.