17-Hydroxy-16-(methoxycarbonyl)-4α-methylsarpagan-4-ium

The 16-epimer of Macusine A also occurs in the bark extract from Strychnos toxifera, isolated as the chloride, m.p. 260-10 C (dec.); [α]²⁴_D - 60.8° (c 2.13, H20). The ultraviolet spectrum of this salts has been determined, showing absorption maxima at 222, 272, 278 and 289 mil. The iodide is also crystalline with m.p. 285°C (dec.).

Battersby, Yeowell., J. Chem. Soc., 4419 (1964)