Using O=C1CCC(=O)N1Br, COC(=O)c1cn(COCC[Si](C)(C)C)cn1 to produce COC(=O)c1cn(COCC[Si](C)(C)C)c(Br)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.