Using COc1ccc(Br)c(C=C2CCN(C(=O)OC(C)(C)C)CC2)c1 to produce COc1ccc(Br)c(CC2CCN(C(=O)OC(C)(C)C)CC2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.