Using COc1ccc(Cn2cc([Si](C)(C)C)c3c([nH]c4ncc(C)cc43)c2=O)cc1, II to produce COc1ccc(Cn2cc(I)c3c([nH]c4ncc(C)cc43)c2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.