Withanolides from hyoscyamus niger seeds
Three withanolide class steroids were isolated from the seeds of Hyoscyamus niger. Two of them were identified as daturalactone-4 (1) and Nic-3 (which is now named hyoscyamilactol) (2). The new compound was elucidated as 16alpha-acetoxyhyoscyamilactol (3) on the basis of spectroscopic properties and X-ray crystallographic analysis.
Ma
CY
Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, and School of Chinese Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong.
Williams
ID
Che
CT