The residue was cooled, extracted with four 100-ml. portions of chloroform, the organic layer dried with drierite and the solvent removed by distillation on the steam-bath. The solvent-free residue was distilled in vacuo, b. p. 144°( 0.06 mm.) in an all-glass-interjoint apparatus to give a light yellow oil, which could not be induced to crystallize; yield, 60%.The base was identified as the dipicrate, which was prepared in anhydrous diethyl ether and recrystallized several times from a large volume of methanol, m. p. 168-169°( cor.).