title: Steroidal Alkaloids and Stilbenoids from Veratrum taliense.
abstract: Phytochemical investigation of roots and rhizomes of Veratrum taliense yielded a new and six known steroidal alkaloids as well as a new and one reported stilbene derivative. By a combination of spectral methods (IR, MS, (1)H- and (13)C-NMR, COSY, HMQC, HMBC, and NOESY), the structure of the new alkaloid was established as 15-angeloylgermine while the known ones were identified as 15-(2-methylbutyroyl)germine, jervine, 3-veratroylzygadenine, germine, veramiline 3- O-(beta- D-glucopyranoside and stenophylline B-3- O-beta- D-glucopyranoside. The new stilbenoid, named veraphenol, was determined to be 2-(3',5'-dihydroxyphenyl)-6-hydroxybenzofuran, and the known one was shown to be resveratrol. The IN VITRO enzyme assay indicated that 3-veratroylzygadenine and resveratrol are inhibitors of xanthine oxidase. The enzyme inhibitory action of resveratrol, the most active compound found so far in V. TALIENSE, is dose-dependent with the IC (50) value at 30 microM (the IC (50) value of allopurinolused as a positive control in the study is 10 microM).
authors.affiliation: Institute of Biotechnology, Department of Biological Science & Technology, Nanjing University, Nanjing, P.R. China.
authors.forename: C X
authors.initials: CX
authors.lastname: Zhou
authors.forename: J
authors.initials: J
authors.lastname: Tanaka
authors.forename: C H
authors.initials: CH
authors.lastname: Cheng
authors.forename: T
authors.initials: T
authors.lastname: Higa
authors.forename: R X
authors.initials: RX
authors.lastname: Tan