Using CCCC(O)CN, FC(F)(F)c1cccc(-c2ccc(Cl)nn2)c1 to produce CCCC1CN=C2C=CC(c3cccc(C(F)(F)F)c3)=NN21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.