Two New Steroidal Alkaloids from Veratrum nigrum L

Phytochemical studies on Veratrum nigrum L., collected in Shanxi, P. R. China, resulted in the isolation of two new steroidal alkaloids, 23-methoxycyclopamine (1) and 15-O-(2-methylbutanoyl)-3-O-veratroylprotoverine (2). The structures of the two new compounds were established by means of extensive NMR spectroscopic studies.