Using COC(O[Si](C)(C)C)=C(C)C, CC(C)(C)OC(=O)NC(Br)C(=O)OC(C)(C)C to produce COC(=O)C(C)(C)C(NC(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.