Plant mucilages. XXXI. An acety-rich mucous polysaccharide, "lycoris-R-glucomannan," from the bulbs of Lycoris radiata.
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Two new amaryllidaceae alkaloids from the bulbs of Lycoris radiata.
Two new Amaryllidaceae alkaloids, named lycoranines A (1) and B (2), were isolated from the bulbs of Lycoris radiata. Their structures were elucidated on the basis of extensive spectroscopic analysis. Compound 2 was a new-type alkaloid, which provided a new insight into the biosynthesis of alkaloids in Amaryllidaceae plants.
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Phytochemical investigation of the 80% ethanol extract of the bulbs of Lycoris radiata resulted in the isolation of five new Amaryllidaceae alkaloids: (+)-5,6-dehydrolycorine (1), (+)-3α,6β-diacetyl-bulbispermine (2), (+)-3α-hydroxy-6β-acetyl- bulbispermine (3), (+)-8,9-methylenedioxylhomolycorine-N-oxide (5), and 5,6-dihydro-5- methyl-2-hydroxyphenanthridine (7), together with two known compo...
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Lycoris radiata is an important medicinal and ornamental plant of China. In the present study, somatic chromosome counts and karyotype analyses, which are important aspects of plant phylogeny and evolution, were performed in 466 individuals from 25 L. radiata populations by root tip squash method. Chromosome counts revealed that 10 populations were diploid (2n = 2x = 22) and 15 were triploid (2...
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A full-length cDNA (LC3'H) was obtained from a cDNA library of Lycoris radiata by DOP-PCR (degenerate oligonucleotide primer PCR), 3'race and 5'race methods. Compared with the other reported enzymes from different plants, the deduced amino acid sequence of LC3'H exhibits significant homologies to 3'-hydroxylases that are involved in the caffeic acid biosynthesis. These findings suggest that the...
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The limited symptom relief and side effects of current Alzheimer's disease (AD) medications warrant urgent discovery and study of new anti-AD agents. The "cholinergic hypothesis" of AD prompts us to search for plant-derived acetylcholineesterase (AChE) inhibitors such as galanthamine that has been licensed in Europe for AD treatment. We used the unique amyloid β-expressing transgenic C. elegans...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1982
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.30.3965