3. The Alkaloids of the Pukatea.

By B. C. Aston. (Journ. Chem. Soc., xcvii, pp. 1381–87. July, 1910.)

In addition to the author's previously published work (see Proc. N.Z. Inst., 1909, pt. ii, p. 56), the methods of preparation, description, and analyses of the, salts of the alkaloid Laureline C₁₉H₂₁o₃N, the sulphate (C₁₉H₂₁O₃N)₂H₂SO₄7H,₂O, the hydrochloride C₁₉H₂₁O₃N HCI, and the nitrate C₁₉H₂₁O₃N HNO₃, are given. The provisional formula C₁₆H₁₉O₃N is suggested for a third alkaloid, neither the hase nor the salts of which could be obtained in a crystalline state. Pukateine, C₁₇H₁₇O₃N, is shown to possess feebly acid properties in the presence of a strong base, forming salts with the alkali metals of the formula C₁₇H₁₆MO₃N (M - K or Ne) and to have an optical activity of a D¹⁵ D—220°.

B. C. A.