Selaginellin A and B, two novel natural pigments isolated from Selaginella tamariscina
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AbstractTwo new unusual natural pigments were first isolated from the whole herbs of Selaginella tamariscina. The structure of selaginellin A (1) was established as (R,S)-4-[(4'-hydroxy-3-((4-hydroxyphenyl)ethynyl)biphenyl-2-yl)(4-hydroxvphenyl)methylene]-2,5-cyclohexadien-1-one and selaginellin B (2) as (R,S)-4-[4'-methoxy-4-(methyl)-3-((4-methoxyphenyl)ethynyl)biphenyl-2 -yl)(4-methoxyphenyl)methylene]-2,5-cyclohexadien-1-one, along with four known biflavonoids, amentoflavone (3), hinokiflavone (4), heveaflavone.(5), and 7 ''-O-methylamentoflavone (6). Their chemical structures were elucidated by spectral analysis of electrospray ionization mass spectroscopy (ESI-MS), one-dimensional nuclear magnetic resonance spectroscopy (1D-NMR) and two-dimensional-nuclear magnetic resonance spectroscopy (2D-NMR) including H-1-NMR, C-13-NMR, distortionless enhancement by polarization transfer (DEPT) and heteronuclear multiple bond coherence (HMBC), and singlecrystal X-ray diffraction techniques.
All Author(s) ListCheng XL, Ma SC, Yu JD, Yang SY, Xiao XY, Hu JY, Lu Y, Shaw PC, But PPH, Lin RC
Journal nameChemical and Pharmaceutical Bulletin
Volume Number56
Issue Number7
PublisherPharmaceutical Society of Japan (公益社団法人日本薬学会)
Pages982 - 984
LanguagesEnglish-United Kingdom
KeywordsSelaginella tamariscina; selaginellin A; selaginellin B
Web of Science Subject CategoriesChemistry; Chemistry, Medicinal; CHEMISTRY, MEDICINAL; Chemistry, Multidisciplinary; CHEMISTRY, MULTIDISCIPLINARY; Pharmacology & Pharmacy; PHARMACOLOGY & PHARMACY

Last updated on 2020-21-09 at 01:11