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1.
Daisuke Takaoka Akihiko Matsuo Mitsuru Nakayama Shûichi Hayashit 《Phytochemistry》1983,22(7):1653-1655
Three new diterpenoids of the verrucosane class were isolated as minor constituents of the methanol extract of the liverwort Mylia verrucosa and their structures shown to be 2β,9α,13β-trihydroxyverrucosane,9α-acetoxy-2β,13β-dihydroxyverrucosane and 2β,13β-dihydroxy-9-oxoverrucosane. 相似文献
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3.
The known compounds chrysoeriol, apigenin, luteolin, acacetin, scutellarein, 6-methoxyluteolin, apigenin 7-glucoside, luteolin 7-glucoside, esculetin, chrysophanol, asphodeline, mircocarpin, sitosterol, 1-β-acetoxyeudesman-4(15),7(11)dien-2α,12-olide and 1-β-acetoxy-8β-hydroxyeudesman-4(15),7(11)-dien-8α,12-olide were isolated from Asphodeline globifera and A. damascena. A new sesquiterpene lactone 1-β-acetoxy-8β-ethoxyeudesman-4(15),7(11)dien-8α, 12-olide was also characterized. These are the first reports of sesquiterpene lactones in Asphodeline and in the Liliaceae. 相似文献
4.
J. De Pascual Teresa J.G. Urones P. Basabe H. Carrillo M.A.G. Muñoz I.S. Marcos 《Phytochemistry》1985,24(4):791-794
From the neutral fraction of the hexane extract of Halimium viscosum the following components were isolated; 7-labdene-3β,l5-diol, 15-acetoxy-7-labden-3β-ol and a new diterpene-lactone with a rearranged ent-labdane skeleton, 13S-ent-9, 1-friedo-labd-1(10)-en-15-acetoxy-2R,18-olide. From the non-saponifiable part, beside 7-labdene-3β, 15-diol and 7, 13E-labdadiene-3β, 15-diol, the new diterpene 8(17)-labdene-3β, 7α, 15-triol was extracted. The structures were elucidated by spectroscopic methods, correlations or synthesis. 相似文献
5.
Investigation of the aerial parts of Inula oculus-christi L. led to the identification of four new sesquiterpene lactones: an eudesmanolide (4α,15α-epoxypulchellin E) and three guaianolides (2α-acetoxy-4α,9β-dihydroxy-1β-guaia-11(13),10(14)-dien-12,8α-olide, 9β,10β-epoxygaillardin, 9α,10α-epoxy-2-epi-gaillardin), in addition to the known gaillardin, pulchellin E, pulchellin C and 3-O-palmitates of 16β-hydroxylupeol, 16β-hydroxy-β-amyrin, and faradiol. The structures of all compounds have been elucidated on the basis of their spectral data. 相似文献
6.
The structures of two new diterpenoids, galeopsin and pregaleopsin, isolated from aerial parts of Galeopsis angustifolia (Labiatae) have been shown to be 8β-acetoxy-15,16-epoxy-9α-hydroxylabda-13(16),14-dien-7-one and 8β-acetoxy-9α,13R; 15,16-diepoxylabd-14-en-7-one, respectively, by chemical and spectroscopic studies. The previously known diterpenoid hispanolone (15,16-epoxy-9α-hydroxy-8α-labda-13(16),14-dien-7-one) has been also obtained from the same source. A thermal retroaldol reaction in the absence of solvent experienced by these 9-hydroxy-7-keto-labdanes is also described. 相似文献
7.
Repetition of an investigation of the petrol extracts of Rhodomyrtus tomentosa has led to the isolation of two new triterpenoids, R4 from the leaves and R5 from the stems besides R1, R2, R3 and the other known compounds already reported. R1 and R4 were proved to be 21α-hop-22(29)en-3β,30-diol and 3β-hydroxy-21α-hop-22(29)-en-30-al respectively, and R2, R3 and R5 are 3β-acetoxy-11α,12α-epoxyoleanan-28,13β-olide, 3β-acetoxy-12α-hydroxyoleanan-28, 13β-olide and 3β-acetoxy-12-oxo-oleanan-28,13β- olide respectively. The ethanol extract of the leaves contained betulinic, ursolic and aliphitolic acids and that of the stems betulonic, betulinic and oleanolic acids. 相似文献
8.
Two new diterpenes ribenol [3α-hydroxy-(?)-13-epimanoyl oxide] (I)and 7β-acetoxy-18-hydroxytrachylobane (IX) as well as the known (?)-13-epimanoyl oxide (IV) have been isolated from Sideritis canariensis Ait. 相似文献
9.
Four eudesmane sesquiterpenoid lactones (1–4) and seven abietane diterpenoids (5–11) were isolated from the whole plants of Ajuga forrestii. Among them, 3α-acetoxy-1α,8β-dihydroxyeudesm-7(11)-en-8,12-olide (1), 3α-acetoxy-1α-hydroxyl-eudesm-8,7(11)-dien-8,12-olide (2), 1α-acetoxy-8α-oxyethyl-2-oxo-eudesman-3,7(11)-dien-8,12-olide (3) and 2α,3β,11,12-tetrahydroxy-7β,20-epoxy-8,11,13-abietatriene (11) are novel compounds. The structures of compounds 1–11 were determined by spectroscopic analysis. Compound 2 exhibited weak cytotoxicity on HepG2 and MCF-7 cell lines. 相似文献
10.
The three new migrated hopene type triterpenes 12α-acetoxy-3β-hydroxyfern-9(11)-ene, 3β,12α-dihydroxyfern-9(11)-ene and 3,12-diketofern-9(11)-ene have been isolated from the ether extracts of the lichen Xanthoria resendei, together with peroxyergosterol and the anthraquinone pigments physcion, fallacinal and fallacinol. 相似文献
11.
In addition to five known triterpenoids, namely acinosolic acid, phytolaccagenin, phytolaccagenic acid, esculentic acid and jaligonic acid, three new oleanane derivatives, designated as phytolaccagenin A, acinosolic acid A and acinosolic acid B, have been isolated and characterized from the defatted berries of Phytolacca acinosa. The new compounds have been identified as 3β-acetoxy-3β-methyloleanate-12-en-2β,23α-diol-28β-oic acid, 3β-acetoxy-28β-methyloleanate-12-en-2β-ol-30β-oic acid and 2β-acetoxy-28β-methyloleanate-12-en-3β-ol-30β-oic acid, respectively. 相似文献
12.
Peter Malakov Georgi Papanov Jasmin Jakupovic Michael Grenz Ferdinand Bohlmann 《Phytochemistry》1985,24(10):2341-2343
From the aerial part of Leonurus cardiaca a new labdane diterpenoid, leocardin, has been isolated and its structure was established by spectroscopic and chemical means. It has been shown to be 8β-acetoxy-9α,13α,15,16-bisepoxy-15-hydroxy-7-oxo-labdan-6β,19-olide present as a C-15 epimeric mixture. 相似文献
13.
Giuseppe Savona Franco Piozzi Orietta Servettaz Benjamín Rodríguez Francisco Fernández-Gadea Manuel Martín-Lomas 《Phytochemistry》1984,23(4):843-848
From the aerial part of Teucrium flavum subsp. glaucum a new neo-clerodane diterpenoid, teuflavin, and a new 19-nor-neo-clerodane glucoside, teuflavoside, have been isolated, besides the previously known diterpene teuflin. The structures of teuflavin (19-acetoxy-4α,18:15,16-diepoxy-6β-hydroxy-3-keto-neo-cleroda-13(16),14-diene-20,ξ,12S-hemiacetal) and teuflavoside (18-acetoxy-15,16-epoxy-19-nor-neo-cleroda-4,13(16),14-trien-20,12S-olid-6β-yl-2′-O-acetyl-β-d-glucopyranoside) were established by chemical and spectroscopic means and by correlation with known compounds. In addition, the previously known flavone salvigenin has also been obtained from the same source. 相似文献
14.
Hydroxylation of l7α-acetoxy-6-chloro-16-methylene-4,6-pregnadiene-3,20-dione (Chlorosuperlutin, I) byCunninghamella blakesleeana yielded a 15β-hydroxyderivative II. Analogous transformation of 17α-acetoxy-16-methylene-4,6-pregnadiene-3,20-dione (Superlutin, IV) included a hydroxylation in position 15β and probably also in 11β with a concomitant reduction of the 6,7-double bond. 相似文献
15.
Na Liu Li Zhang Song Wang Xiao-Ning Wang Shu-Qi Wang Hong-Xiang Lou 《Phytochemistry letters》2012,5(2):346-350
Phytochemical investigation of the Et2O extract of liverwort Apomarsupella revolute led to isolation and identification of five new eudesmane-type sesquiterpenoids, 6β-hydroxy-9β-acetoxy-eudesma-4,11-dien (1), 6β-hydroxy-9β-acetoxy-eudesma-4,11-dien-3-one (2), 5α,6β-dihydroxy-9β-acetoxy-eudesma-4(15),11-dien (3) 4β-hydroxy-9β-acetoxy-11,12,13-trinor-5-eudesmen-7-one (4) and 4β-methox-9β-acetoxy-11,12,13-trinor-5-eudesmen-7-one (5), two of which were trinorsesquiterpenoids. Their structures were established unequivocally on the basis of spectroscopic data analysis. All compounds were preliminary bioscreened for their cytotoxicities and antifungal activities. 相似文献
16.
Pieter S. Steyn Robert Vleggaar Christiaan J. Rabie Nicolaas P.J. Kriek Jack S. Harington 《Phytochemistry》1978,17(5):949-951
Four mycotoxins isolated from moulded maize cultures of Fusarium sulphureum have been characterized as 3α,4β,15-triacetoxy-12,13-epoxytrichothec-9-ene, 4β,15-diacetoxy-3α-hydroxy-12,13-epoxytrichothec-9-ene, 15-acetoxy-3α,4β-dihydroxy-12,13-epoxytrichothec-9-ene and 4β-acetoxy-3α,15-dihydroxy-12,13-epoxytrichothec-9-ene. 相似文献
17.
Giuseppe Savona Franco Piozzi Orietta Servettaz Francisco Fernández-Gadea Benjamín Rodríguez 《Phytochemistry》1984,23(3):611-613
A new neo-clerodane diterpenoid, teumarin, was isolated from the aerial part of Teucrium marum. Its structure, 19-acetoxy-4α,18:15,16-diepoxy-2β,6β-dihydroxy-neo-cleroda-13(16),14-dien-20,12S-olide, was established by chemical and spectroscopic means and by comparison with closely related compounds. 相似文献
18.
Ayhan Ulubelen Nezhun Gören Ferdinand Bohlmann Jasmin Jakupovic Michael Grenz Nevin Tanker 《Phytochemistry》1985,24(6):1305-1308
In addition to previously obtained furanosesquiterpenes, two new eudesmanolides and a new glechomanolide were isolated from the fruits of Smyrnium cordifolium, while the roots gave two new eudesmanolides. The new compounds from the fruits were 1β-acetoxy-eudesman-4(15), 7(11)-dien-8,12-olide, 1β-acetoxy-8β-hydroxy-eudesman-4(15),7(11)-dien-8,12-olide, 1β,10α;4α,5β-diepoxy-8-hydroxy-glechomanolide, those obtained from the roots were smyrnicordiolide and the corresponding 8β-hydroxy derivative belonging to a new type of oxepine derivative. 相似文献
19.
Jing Xu Chunfeng Xie Da-qing Jin Yuanqiang Guo Peng Zhao Shaonan Wang Yisha He 《Phytochemistry letters》2012,5(4):713-716
Three new β-dihydroagarofuran sesquiterpene polyesters, 1β-acetoxy-8α,9β-dibenzoyloxy-13-nicotinoyloxy-β-dihydroagarofuran (1), 1β,2β-diacetoxy-9α-benzoyloxy-13-nicotinoyloxy-β-dihydroagarofuran (2), and 6α,8α,9β,13-tetraacetoxy-1β-cinnamoyloxy-2β,4α-dihydroxy-β-dihydroagarofuran (3) were isolated from the fruits of Celastrus orbiculatus Thunb. Their structures were determined by means of extensive spectroscopic analyses (IR, ESIMS, HRESIMS, 1D and 2D NMR). 相似文献
20.
María C. García-Alvarez José L. Marco Benjamín Rodríguez Giuseppe Savona Franco Piozzi 《Phytochemistry》1982,21(10):2559-2562
From the aerial part of Teucrium pyrenaicum three new neo-clerodane diterpenoids have been isolated. Their structures, 3β-acetoxy-4α,18:12S,2OS: 15,16:19, 2OS-tetraepoxy-neo-cleroda-13(16),14-dien-6-one (teupyrenone), 3β,6α,19-triacetoxy- 4α,18:15,16-diepoxy-neo-cleroda-13(16),14-dien-20,12S-olide (teupyreinin), and 3β, 6α,19,2OS-tetra-acetoxy-4α,18:12S,2OS: 15,16-triepoxy-neo-cleroda-13(16), 14-diene (teupyreinidin), were established mainly by spectroscopic means. 相似文献