Using O=C1CCC(=O)O1, Nc1ccn([C@@H]2O[C@H](CO)[C@@H](O)C2(F)F)c(=O)n1 to produce Nc1ccn([C@@H]2O[C@H](COC(=O)CCC(=O)O)[C@@H](O)C2(F)F)c(=O)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.