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