Using O=C(O)c1cc2cc(F)ccc2n1Cc1cccc(F)c1, Nc1ccc(N2CCCC2)nc1 to produce O=C(Nc1ccc(N2CCCC2)nc1)c1cc2cc(F)ccc2n1Cc1cccc(F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.