title: Withanolides from hyoscyamus niger seeds
abstract: 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.
authors.affiliation: 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.
authors.initials: CY
authors.lastname: Ma
authors.initials: ID
authors.lastname: Williams
authors.initials: CT
authors.lastname: Che