Two stilbenoids from the orchid Eria flava
TL;DR: Flavanthridin and flavanthrinin, two new stilbenoids, were isolated from the orchid Eria flava which also afforded 2,7-dihydroxy-4-methoxy-9,10- dihydrophenanthrene (coelonin), its 1,1′-dimer (flavanthrin).
About: This article is published in Phytochemistry.The article was published on 1990-01-01. It has received 42 citations till now. The article focuses on the topics: Eria.
Citations
More filters
TL;DR: The present study furnishes an overview of the hydroxy or/and methoxy-substituted 9,10-dihydro/phenanthrene, methylated, prenylated and other monomeric derivatives, dimeric and trimeric phenanthrenes and their biological activities.
282 citations
TL;DR: Thirteen plant species, namely: Bombax ceiba, Canarium strictum, Chloranthus erectus, Xanthium indicum, Lycopodium clavatum, Coleus blumei, Batrachospermum atrum and Chlorella vulgaris are reported for the first time for the treatment of inflammation-related diseases.
135 citations
TL;DR: Two new phenanthrenes (4,9-dimethoxyphenanthrene-2,5-diol and 4,6-dimethyltoxymethylhexane-1,3,7-triol) and two new 9,10-dihydrophenanthreness (4methoxy-9, 10-dibenzyls and the triterpenoid friedelin were isolated and characterized from the hexane extract of the orchid Bulbophyllum vaginatum) were determined by spectroscopic analyses
94 citations
TL;DR: A new enantiomeric pair of spirodiketones, (+)- and (-)-denobilone A (1 and 2), three new phenanthrene derivatives (3-5), and three new biphenanthrenes (22-24), along with 11 known phenanthene derivatives (6-16), five known bibenzyl derivatives (17-21), and four known biphenAnthrenes
Abstract: A new enantiomeric pair of spirodiketones, (+)- and (-)-denobilone A (1 and 2), three new phenanthrene derivatives (3-5), and three new biphenanthrenes (22-24), along with 11 known phenanthrene derivatives (6-16), five known bibenzyl derivatives (17-21), and four known biphenanthrenes (25-28), were isolated from Dendrobium nobile. The structures of 1-5 and 22-24 were elucidated using comprehensive spectroscopic methods. (+)-Denobilone and (-)-denobilone A (1 and 2) were isolated as a pair of enantiomers by chiral HPLC. The absolute configurations of (+)- and (-)-denobilone A (1 and 2) were determined by comparing their experimental and calculated electronic circular dichroism spectra. The absolute configuration of denobilone B (3) was determined by X-ray crystallographic analysis. The inhibitory activities of all compounds against nine phytopathogenic fungi and three cancer cell lines were evaluated.
72 citations
References
More filters
TL;DR: 2,7-Dihydroxy-4-methoxy-9,10-dihydrophenanthrene was isolated and identified from the whole plant of Coelogyne ochracea and C. elata.
77 citations
TL;DR: Lusianthrin and lusian-thridin, two new stilbenoids, were isolated from the orchid Lusia indivisa.
66 citations
TL;DR: Flavanthrin, the first dimeric 9,10-dihydrophenanthrene derivative, was isolated from the orchid Eria flava which also yielded the previously reported 9, 10-dibhrenanthrene coelonin this paper.
54 citations
TL;DR: Bulbophyllanthrin, a novel phenanthrene derivative from the orchid B. leopardium, was shown to have the structure 1a mainly on the basis of spectral evidence including 13 C and 2D NMR spectra as discussed by the authors.
43 citations
19 citations