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