The mixture was stirred at 10-15°for forty-five minutes and then 450.0 ml. of petroleum ether was added. The upper layer was separated and washed with water. The combined aqueous phases were washed with petroleum ether and then acidified. The pale yellow solid which separated was dissolved in a minimum volume of ether and dried with magnesium sulfate. The product was precipitated from the ether solution in the form of needle-like crystals by addition of petroleum ether. The yield was 149.0 g. (75.2%), m. p. 77-78°; recrystallized from petroleum ether, colorless
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