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