An alkaloid of Tylophora asthmatica, the base crystallizes as the hemihydrate,
m.p. 232-3°C (dec.) and has[α]27D - 14.2° (c 1.76, CHCI3). The ultraviolet
spectrum in MeOH has absorption maxima at 258, 287 and 340 Mu. The salts
crystallize well, e.g. the hydrochloride, m.p. 257°C (dec.); nitrate, m.p. 240-
2°C; methiodide, m.p. 243-5°C (dec.) and the O-acetate, m.p. 222-3°C.
Hooper., Pharm. J., 21,6 (1891)
Chopra et al., Arch. Pharm., 275,236 (1937)
Govindachari, Pai, Nagarajan.,J. Chem. Soc., 2801 (1954)
Govindachari et al., Tetrahedron, 14,288 (1961)
