... 0 1985 American Chemical Society Page 2. ... 'Distilled water (0.1%) was added. gLit.22 [cf]25D -27.0' (c 5, EtOH). hObtained from comparison with [a]25D of the (S)-3 chemically synthesized by us. 'To our knowledge, optically active 4 has never been prepared. ...