title: Seven novel seco-prezizaane-type sesquiterpenes from the pericarps of Illicium merrillianum.
abstract: Seven new seco-prezizaane-type sesquiterpenes were isolated from the methanol extract of the pericarps of Illicium merrillianum. Their structures were elucidated as 3-deoxypseudoanisatin (1), 2beta-hydroxy-3,6-dedioxypseudoanisatin (2), 8alpha-hydroxy-10-deoxycyclomerrillianolide (3), 10beta-hydroxypseudoanisatin (4), 10beta-hydroxycyclopseudoanisatin (5), 1,6-dihydroxy-3-deoxyminwanensin (6), and 8-deoxymerrilliortholactone (7) by analyses of their spectroscopic data and chemical transformation. Compounds 4 and 5 as well as 6 and 7 coexist as a keto/acetal equilibrated mixture in methanol solution.
authors.affiliation: Faculty of Pharmaceutical Sciences, Beijing University of Chinese Medicine, No. 6 Wangjing Zhonghuannanlu, Chaoyang District, Beijing 100102, China.
authors.forename: Jian-Mei
authors.initials: JM
authors.lastname: Huang
authors.forename: Chun-Shu
authors.initials: CS
authors.lastname: Yang
authors.forename: Ren
authors.initials: R
authors.lastname: Zhao
authors.forename: Hironobu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Yoshiyasu
authors.initials: Y
authors.lastname: Fukuyama
mesh_terms: D000107:Acetylation; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D005638:Fruit / Q000737:chemistry; D029523:Illicium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol; D010936:Plant Extracts / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification; D012997:Solvents; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D010936:Plant Extracts; D012717:Sesquiterpenes; D012997:Solvents; D000432:Methanol