摘要:

From the leaves ofPhytolacca acinosaa new glycoside, named esculentoside S has been identified as 3-O-β-D-xylopyranosyl-28-O-β-D-glucopyranosyl-phytolaccagenin. Besides this the known 2 glycosides esculentoside A and esculentoside B were found.

ISSN:1057-5634    

DOI:10.1080/10575639308043817

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The stem ofDiploclisia glaucescensaffordedvibo-quercitol and four new saponins, whose structures have been established. One saponin has shown acceptable molluscicidal activity.

ISSN:1057-5634    

DOI:10.1080/10575639308043818

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Sesquipinsapols A and B, two sesquilignans isolated from the wood ofAbies pinsapohave been characterized as 4′,4″,9″-trihydroxy-3,3′,3″-trimethoxy-4,8″-epoxy-8,8′-sesquineolignan-9,9′-olide and 4,4″,9,9′,9″-pentahydroxy-3,3′,3″-trimethoxy-7,4′-epoxy-8,5′:8′,8″-sesquineolignan, respectively, on the basis of their spectral data, mainly two-dimensional NMR analysis.

ISSN:1057-5634    

DOI:10.1080/10575639308043819

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Fully acetylated carbohydrate derivatives were used as C-sources instead of glucose for cultivation of Acetobacter xylinum. The resulting bacterial celluloses were analysed by IR-spectroscopy for possible incorporation of these substrates into the (1→4)-β-glucan chains. It is established, that acetyl substituents found in the polymer product are due to acetylated derivatives which are associated or intercalated with the produced bacterial cellulose.

ISSN:1057-5634    

DOI:10.1080/10575639308043820

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

3,3-Disubstituted oxindoles were converted to the correspondingNa-methoxyoxindoles via tungstate-catalyzed oxidation of indoline derivatives. This method was applied to the synthesis ofGelsemiumalkaloids, gelsevirine and humantenirine.

ISSN:1057-5634    

DOI:10.1080/10575639308043821

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

To enhance bioavailability of cysteamine, thioglycosides6, 7, 8and 6-thioethers of D-glucose12, 13were synthesized. Conjugation of thioglucosides with glycine led to derivatives10 and 11.

ISSN:1057-5634    

DOI:10.1080/10575639308043822

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Excentricine(1), a novel skeleton tetrahydroisoqinoline alkaloid possessing an eight-membered oxygen-heterocyclic ring, was isolated along with eight known alkaloids from the roots ofStephania excentrica. The structrue of excentricine was established as1from spectroscopic analysis.

ISSN:1057-5634    

DOI:10.1080/10575639308043823

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Coniothyriol, a new fungal metabolite has been isolated from the ethyl acetate extractable fraction ofConiothyrium sporulosumbroth. Its structure was identified as rel-(2R,5R,8R,11S)-4,7-dioxa-3,10-dioxo-11-hydroxy-2-methyl-6-methylene-tricyclo[6.3.3.0.01,5]undecane on the basis of spectroscopic data relative to both the natural product and the monoacetyl derivative.

ISSN:1057-5634    

DOI:10.1080/10575639308043824

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The occurrence of jasmonates was screened in culture filtrates of 46 fungal strains belonging to 23 different genera. In culture filtrates of 7 selected species jasmonic acid and 7-iso-jasmonic acid and 6 minor jasmonates could be detected and quantified partially.

ISSN:1057-5634    

DOI:10.1080/10575639308043825

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A new epoxy acetogenin, tripoxyrollin(1), has been isolated from the seeds of the Colombian Annonaceae,Rollinia membranacea. Its structure was elucidated on the basis of spectral data. Biomimetic synthesis of isodesacetyluvaricin(2)from tripoxyrollin(1)suggests its key role in the biogenesis of the adjacent bis-tetrahydrofuran acetogenins.

ISSN:1057-5634    

DOI:10.1080/10575639308043826

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor