The Chinese drug 'Kou-wen', said to be derived from Gelsemium elegans Benth.,
is stated to contain this alkaloid which forms rhombic prisms from Me2 CO. It
has [α]23D - 265° (EtOH) and forms a crystalline hydrochloride, m.p. 255°C
(dec.) and a hydrobromide, m.p. 269°C (dec.).
Chou, Pak, Hou., Chin. 1. Physiol., 5, 345 (1931)
Chou, Wang, Chen., ibid, 8,40 (1934)
Chi, Kao, Huang., 1. Amer. Chem. Soc., 60, 1723 (1938)
