(20α)-16,17-Didehydro-11-methoxy-19β-methyl-18-oxayohimban-16-carboxylic acid methyl ester

This alkaloid is fairly widespread among the members of the Rauwolfia species where it is found mainly in the leaves. It is isomeric with Raumitorine (q.v.) from which it differs only in the position of the methoxyl group. The ultraviolet spectrum in EtOH has three absorption maxima occurring at 229, 265 and 282 mμ.

Salkin, Hosansky, Janot.,l. Pharm. Sci., 50,1038 (1961)
Shamma, Richey.,J. Amer. Chem. Soc., 85,2507 (1963)