... of acetic acid, 50 cc. of acetic anhydride and 20 g. of sodium acetate and refluxed for two hours. The solution was poured into ice water and the precipitate (5) Arnold and Sprung, THIS JOURNAL, 60, 1163 (1938). (6) Mills and Nixon, J . Chenz. Soc., 2510 (1930). (7) Kamm, McClugage and Landstrom, THIS JOURNAL, 39, 1247 (1917). recrystallized from ethanol; yield 4.5 g., rn. p. 103-105". The material was not quite pure. ...