Using COc1nn2c(Br)cccc2c1NC(=O)OC(C)(C)C, BrCC1CC1 to produce COc1nn2c(Br)cccc2c1N(CC1CC1)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.