Results 161 to 170 of about 1,462 (205)

Quassinoids from Eurycoma longifolia

Journal of Natural Products, 2009
Ten new structurally diverse quassinoids (1-10) and 14 known compounds were isolated from the stems of Eurycoma longifolia. The new compounds were two eurycomanone-type C(20) quassinoids (1, 2), one klaineanone-type C(20) quassinoid (3), one C(19) quassinoid (4) with a 1,2-seco-1-nor-6(5-->10)-abeo-picrasan-2,5-olide skeleton, and six eurycomalactone ...
Katsunori, Miyake, Yasuhiro, Tezuka, Suresh, Awale, Feng, Li, Shigetoshi, Kadota   +4 more
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The Toxicity of Some Quassinoids from Eurycoma longifolia

Planta Medica, 2002
The 50 % aqueous ethanol extract of Eurycoma longifolia Jack (Simaroubaceace) roots was partitioned with diethyl ether, n-butanol and then water. Acute toxicity studies of each fraction on mice administered orally and brine shrimps revealed that the n-butanol fraction was the most toxic.
Kit-Lam, Chan, Chee-Yan, Choo
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Antiinflammatory and analgesic effects of Eurycoma longifolia extracts

Archives of Pharmacal Research, 2016
Eurycoma longifolia is one of the most popular herbal medicines in Southeast Asia. The purpose of this study is to evaluate the analgesic and anti-inflammatory effects of the methanolic extract of E. longifolia roots (TA) in vivo and to investigate the underlying mechanisms.
Young Min, Han, Sang-Uk, Woo, Min Sun, Choi, Yu Na, Park, Seung Hyun, Kim, Hyungshin, Yim, Hye Hyun, Yoo   +6 more
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Cytotoxic and antimalarial constituents from the roots of Eurycoma longifolia

Bioorganic & Medicinal Chemistry, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ping-Chung, Kuo, Amooru G, Damu, Kuo-Hsiung, Lee, Tian-Shung, Wu   +3 more
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Squalene derivatives from Eurycoma longifolia

Phytochemistry, 1993
Abstract Three novel cytotoxic squalene-type triterpenes, eurylene, 14-deacetyl eurylene and longilene peroxide, together with teurilene were isolated from ...
Hiroshi Morita, Etsuko Kishi, Koichi Takeya, Hideji Itokawa, Yoichi Iitaka   +4 more
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Biphenylneolignans from wood of Eurycoma longifolia

Phytochemistry, 1992
Abstract Two novel isomeric 2,2′-dimethoxy-4-(3-hydroxy-1-propenyl)-4′-(1,2,3-trihydroxypropyl) diphenyl ethers, and two novel biphenyls, 2-hydroxy-3,2′,6′-trimethoxy-4′-(2,3-epoxy-1-hydroxypropyl)-5-(3-hydroxy-1-propenyl)-biphenyl and 2-hydroxy-3,2′-dimethoxy-4′-(2,3-epoxy-1-hydroxypropyl)-5-(3-hydroxy-1-propenyl)-biphenyl, were isolated from the ...
Hiroshi Morita, Etsuko Kishi, Koichi Takeya, Hideji Itokawa   +3 more
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Eurycomalin A, a New Dimeric Dihydrobenzofuran from Eurycoma longifolia

HETEROCYCLES, 2004
One new dimeric 2-isopropenyl-2, 3-dihydrobenzofuran, eurycomalin A (1), was characterized from the methanol extract of the root of Eurycoma longifolia by the 1D and 2D spectral and chemical transformation studies. The reported structure of eurycomalide A (2) was revised through detail 2D spectral analyses.
Ping‐Chung Kuo, Chung‐Ren Su, Amooru G. Damu, Tian‐Shung Wu   +3 more
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Quassinoids from Eurycoma longifolia as plant growth inhibitors

Phytochemistry, 2001
Seven quassinoids including a new 12-epi-11-dehydroklaineanone were isolated from the leaves of Eurycoma longifolia (Simaroubaceae) as plant growth inhibitors or related compounds. The strongest activity was found in 14,15beta-dihydroxyklaineanone.
S, Jiwajinda, V, Santisopasri, A, Murakami, N, Hirai, H, Ohigashi   +4 more
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New antiulcer quassinoids from Eurycoma longifolia

European Journal of Medicinal Chemistry, 1991
Abstract A bioassay study of Pasak bumi (Eurycoma longifolia) led to the isolation of four quassinoids, pasakbumin-A (1), -B (2), -C (4), and -D (7). Both pasakbumin-A (= eurycomanone) 1 and pasakbumin-B 2 exhibited potent antiulcer activity. This prompted us to test some modified quassinoids to reveal that ailanthone (8), the main quassinoid of ...
H Tada, F Yasuda, K Otani, M Doteuchi, Y Ishihara, M Shiro   +5 more
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In Vitro Shoot Organogenesis of Eurycoma longifolia

The Planter, 2002
Direct shoot organogenesis could be induced from the shoots, nodes and cotyledon tissues of the in vitro Eurycoma longifolia seedlings. Multiple shoots could be formed from shoot and node explants that were cultured in MS medium + 1.50 mg/L BAP + 0.25 mg/L NAA. While cotyledon tissues could produce multiple shoots when cultured in MS medium + 0.75 mg/L
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