(20S)-20-[(S)-3,4-Dihydro-5-methyl-2H-pyrrol-2-yl]pregn-5-en-3β-ol

A norcholestanol alkaloid from Veratrum album, this base has [α]²⁵_D + 7.5° (CHCI3). The O,N-diacetyl derivative is amorphous and has [α]²⁵_D - 98° (EtOH). Catalytic hydrogenation yields a dihydro derivative, m.p. 1 03-soC and a tetra_x0002_hydro compound, m.p. 247-2S0°C.

Tomko, Brazdova, Voticky., Tetrahedron Lett., 3041 (1971)