Using CC(C)(C)OC(=O)N[C@@H](CO)C(=O)O, CC1(CBr)COC1 to produce CC1(COC[C@H](NC(=O)OC(C)(C)C)C(=O)O)COC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.