共查询到20条相似文献,搜索用时 15 毫秒
1.
Maria de Bernardi Giovanni Fronza Giorgio Mellerio Giovanni Vidari Paola Vita-Finzi 《Phytochemistry》1979,18(2):293-298
Four γ-hydroxybutenolide sesquiterpenes have been isolated from Lactarius scrobiculatus, L. blennius and L. pallidus. Their structures and absolute stereochemistry were determined by spectral data and by conversion to known compounds. 相似文献
2.
Maria De Bernardi Giovanni Fronza Giorgio Mellerio Giovanni Vidari Paola Vitafinzi 《Phytochemistry》1980,19(1):99-101
From the ethanolic extract of Lactarius blennius, a new sesquiterpene blennin D (2-hydroxyblennin A) was isolated and its structure elucidated together with the stereochemistry of the already known blennin A. Treatment of blennin A mesylate with DBU afforded a compound with a new skeleton. 相似文献
3.
From the roots of Guillonea scabra a new sesquiterpene lactone has been isolated. Its structure has been established by spectroscopic means as desangeloylshairidin. 相似文献
4.
A PC survey revealed the occurrence of an unusual amino acid in fruit bodies of the mushroom Lactarius quietus Fr. and a related species. This was identified as l-2-amino-4-methylpimelic acid, which has not been previously reported as a naturally occurring compound. 相似文献
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L.B.de Silva W.H.M.W. Herath R.C. Jennings M. Mahendrant G.E. Wannigama 《Phytochemistry》1982,21(5):1173-1175
A methanolic extract of the plant Elephantopus scaber was found to contain lupeol, stigmasterol and a new germacranolide dilactone 11,13-dihydrodeoxyelephantopin. 相似文献
6.
Giovanni Vidari Maria De Bernardi Paola Vita-Finzi Giovanni Fronza 《Phytochemistry》1976,15(12):1953-1955
Six sesquiterpene lactones were isolated from Lactarius blennius. The structures of two new sesquiterpenes, blennin A and blennin B were determinated by spectroscopic methods and the structure of the seco-compound, blennin C, is revised. The two known furan sesquiterpenes and lactarorufin A were also identified. 相似文献
7.
The isolation of a new diterpene lactone and two known diterpenoid acids from the aerial parts of Viguiera maculata is reported. 相似文献
8.
The sesquiterpene lactone, 2-methyl-2-butenoic acid dodecahydro-4-(hydroxymethyl)-10a-methyl-8-methylene-3,7-dioxooxineno[5,6]cyclodeca[1,2-b]furan-9-yl ester [1aR*-[1aS*,4R*,5aS*,8aR*,9R*(E)]], argophyllone-B, was isolated from acetone extracts from the leaves of Helianthus argophyllus. Its structure has been determined by single crystal X-ray analysis. Complete 1H NMR and 13C NMR assignments have been made. 相似文献
9.
Antonio G. González Jaime Bermejo Guillermo M. Massanet Juan M. Amaro Beatriz Dominguez Antonio Morales 《Phytochemistry》1976,15(6):991-993
Hypochaeris setosus contains desacetoxymatricarin, achillin, 1-hydroxy-6β,7α,11β-H-eudesm-4-en-6,12 olide, jacquinelin and hypochaerin, a new guaianolide, established as 3-oxo-4β,5α,6β,7α,11β-H-guai-1(2)-en-6,12 olide. 相似文献
10.
Mitsumasa Haruna Makiko Kato Kazuo Ito Toshiaki Nikai Hisayoshi Sugihara Hiroyuki Muratat 《Phytochemistry》1981,20(11):2583-2584
Angeloylcumambrin-B, a new antimicrobial guaianolide sesquiterpene lactone, was isolated from Chrysanthemum ornatum and the structure was determined by a combination of chemical and physical methods. 相似文献
11.
Kamo T Matsue M Kashiwabara M Hirota M 《Bioscience, biotechnology, and biochemistry》2006,70(9):2307-2309
A new lactarane sesquiterpene, 1,2-dehydrolactarolide A (1), together with lactarorufin A (2), 3-O-ethyllactarolide A (3) and 3-O-ethyllactarolide B (4), was isolated from a mushroom of the Russulaceae family, Lactarius vellereus. Additionally, two lactarane sesquiterpenes, lactarorufin A (2) and lactarolide A (5) were isolated from L. subpiperatus. 1,2-Dehydrolactarolide A (1) showed promotional activity (152% at 3.6 x 10(1) microM) toward radicle elongation in lettuce seedlings. 相似文献
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The roots of Launaea mucronata afforded, in addition to lactucin, lactucin-8-O-acetate and the corresponding dihydro derivative, 11β,13-dihydrolactucin. 相似文献
16.
2β,23-Dihydroxyacacic acid lactone was isolated from Gymnocladus dioica as an artifact from 2β, 3β 16β, 21β, 23-pentahydroxyolean-12-ene-28-oic acid. 相似文献
17.
《Phytochemistry》1986,25(12):2892-2893
Artemisia annua, a medicinal plant native to China has been introduced into India. In addition to known monoterpenoids, novel sesquiterpenoids including artemisinin, arteannuin-B and flavonoids the plant yielded a new sesquiterpene lactone now named as arteannuin-C. 相似文献
18.
The roots of Hypochoeris oligocephala afforded in addition to known compounds a further sesquiterpene lactone esterified with a sesquiterpenic acid as well as the corresponding free acid. 相似文献
19.
Three new 2,4-linked sesquiterpene lactone dimers (SLDs), faberidilactones F-H (1–3), have been isolated from Carpesium faberi. Unlike 1 and 2, 3 was a modified Diels-Alder adduct, characteristic by a 1′-OH and a Δ5′(6′) double bond. Furthermore, the relative configuration of 1′-OH in 3 was assigned as β-configuration by comparison the experimental NOESY data with those of its two possible epimers. The exo/endo stereochemistry of 1–3 was determined by the spectrographic features of 2,4-linked SLDs that we discovered in our previous works. Compounds 1 and 2 showed potent cytotoxicity against human leukemia (CCRF-CEM) cells with IC50 value of 5.62 and 3.74 μM, respectively. 相似文献