Results 131 to 140 of about 654 (167)

Advances on Bioactive Metabolites with Potential for the Biocontrol of Plant Pathogenic Bacteria. [PDF]

Pathogens
Reveglia P, Corso G, Evidente A.
europepmc   +1 more source

Total synthesis of (-)-2-oxo epimesembranol and (+)-dihydromaritidine via a key Johnson-Claisen rearrangement. [PDF]

RSC Adv
Majumder S, Yadav A, Pal S, Mondal A, Bisai A.   +4 more
europepmc   +1 more source

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Antineoplastic Agents, 162. Zephyranthes candida

Journal of Natural Products, 1990
The Chinese medicinal plant Zephyranthes candida was found to contain a cytostatic constituent. Separation of a n-BuOH extract directed by results of a bioassay employing the P-388 lymphocytic leukemia led to trans-dihydronarciclasine [2] as the principal cytostatic agent with ED50 3.2 X 10(-3) micrograms/ml.
G R, Pettit, G M, Cragg, S B, Singh, J A, Duke, D L, Doubek   +4 more
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Alkaloids of zephyranthes flava

Phytochemistry, 1986
Abstract From fresh, mature seeds of Zephyranthes flava , two new 2-oxyphenanthridinium alkaloids, zefbetaine and zeflabetaine along with 15 known free and glucosyloxy alkaloids have been isolated by gradient solvent extraction, chromatography and derivatization.
Shibnath Ghosal, Sushil K. Singh, Radhey S. Srivastava   +2 more
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Flavans from Zephyranthes flava

Phytochemistry, 1985
Abstract A new optically active flavan aglucone, 7-hydroxy-3′,4′-methylenedioxyflavan, and its 7-glucoside have been isolated from the bulbs of Zephyranthes flava , collected at flowering. Additionally, two known flavans, 7,4′-dihydroxy-3′-methoxyflavan and 7-methoxy-2′-hydroxy-4′,5′-methylenedioxyflavan, have been isolated for the first time from ...
Shibnath Ghosal, Sushil K. Singh, Radhey S. Srivastava   +2 more
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ZEPHYRANTHES GRACILIS HERB. AND ZEPHYRANTHES MINIMA HERB.

American Journal of Botany, 1943
PROBABLY NOT in the entire field of botanical taxonomy and plant nomenclature is greater confusion to be found than now exists around the plants represented by the names Zephyranthes gracilis Herb., Z. minima Herb., Z. Hieronymi Pax and Amaryllis parvula Seub. Several attempts have been made to straighten out the identity of these plants but so far the
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Four new Amaryllidaceae alkaloids from Zephyranthes candida

Journal of Natural Medicines, 2014
Four new Amaryllidaceae alkaloids (1-4) possessing a homolycorine-type or a crinine-type skeleton have been isolated from the aerial part of Zephyranthes candida, and their structures were elucidated on the basis of spectroscopic data. The stereochemistry was elucidated by combination of NOESY correlations and CD analyses.
Nanase, Shitara, Yusuke, Hirasawa, Shunsuke, Hasumi, Tadahiro, Sasaki, Misaki, Matsumoto, Chin Piow, Wong, Toshio, Kaneda, Yoshinori, Asakawa, Hiroshi, Morita   +8 more
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Phosphatidylpyrrolophenanthridine alkaloids from Zephyranthes flava

Phytochemistry, 1987
Abstract Four new alkaloidal phospholipids, 2-O-glycerophosphoryllycorine, phosphatidyllycorines, phosphatidylpseudolycorines and phosphatidyllycorinium methocation, were isolated from the flowers of Zephyranthes flava. The structures of these compounds were established by comprehensive spectral analyses, chemical transformations and synthesis, where
Shibnath Ghosal, Sushil K. Singh, Sankara G. Unnikrishnan   +2 more
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Two alkaloids from Zephyranthes carinata

Phytochemistry, 1998
Abstract Two new Amaryllidaceae alkaloids, 1- O -(3-hydroxybutyryl) pancratistanin and 1-O-(3-O-β- d -glucopyranosylbutyryl) pancratistatin, were isolated from the bulbs of Zephyranthes carinata . The structures of the two alkaloids were established by comprehensive spectral analysis.
Keisuke Kojima, Motoh Mutsuga, Makoto Inoue, Yukio Ogihara   +3 more
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Two new ceramides from Zephyranthes candida

Chemistry of Natural Compounds, 2009
Two new ceramides were isolated from the bulbs of Zephyranthes candida. Their structures were established as (2S,3S,4R,13E)-1,3,4-trihydroxy-2-[(2′R)-2′-hydroxytetracosanoylamino]-13-octadecene, named zephyranamide A (1) and (2S,3S,4R)-1,3,4-trihydroxy-2-octacosanoylaminohexadecene, named zephyranamide B (2).
Zhiping Wu, Yu Chen, Xu Feng, Bing Xia, Ming Wang, Yunfa Dong   +5 more
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