Using CCOC(=O)C(F)(F)F, NC1CCc2cc3c(cc2C1)OCC3 to produce O=C(NC1CCc2cc3c(cc2C1)OCC3)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.