... Pat. Appl. EP469833 A1 (1992). The HPLC retention time and 1 H NMR spectrum were identical to those of a reference sample. (E)-3-[2-(7-Chloro-2-quinolinyl)ethenyl]-δ-hydroxy- benzenepentanenitrile 4. Prepared as described in Eur. Pat. Appl. 0469833 A1.