Using CC1CN(C(=O)OCc2ccccc2)CC1(CC(=O)OC(C)(C)C)C(=O)O, BrCc1ccccc1 to produce CC1CN(C(=O)OCc2ccccc2)CC1(CC(=O)OC(C)(C)C)C(=O)OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.