Using CCCC(=O)N(C)OC, Cn1c(CCO[Si](C)(C)C(C)(C)C)cc2cc(Br)ccc21 to produce CCCC(=O)c1ccc2c(c1)cc(CCO[Si](C)(C)C(C)(C)C)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.