Using O=C(O)c1ccc(C(F)(F)F)nc1, NCc1ccc2[nH]c(C(F)(F)F)cc2c1 to produce O=C(NCc1ccc2[nH]c(C(F)(F)F)cc2c1)c1ccc(C(F)(F)F)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.