摘要:

A new taxane, 14β-hydroxytaxusin (1), was isolated from the bark of the Chinese yew,Tarus mairei.

ISSN:1057-5634    

DOI:10.1080/10575639808048274

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Hot dichloromethane extract of the root bark ofMyristica dactyloidesafforded a novel compound, dactyloidin of structural type completely different from previously reported compounds from the Myristicaceae family.

ISSN:1057-5634    

DOI:10.1080/10575639808048275

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Members of the 16-membered macrolide antibiotic class show activity againstCryptosporidiumandToxoplasma gondii, which are associated with the acquired immune deficiency syndrome. Using carbomycin A as a substrate, we report a new semi-synthetic route for the production of forocidin.

ISSN:1057-5634    

DOI:10.1080/10575639808048276

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Three new steroidal alkaloids, epipachysamine-E-5-ene-4-one (1),Nb-demethylepipachysamine-E-5-ene-4-one (2) andiso-N-formylchonemorphine (3) have been isolated fromSarcococca brevifolia.Structures of these compounds were determined by spectroscopic studies. Compounds 1 and 3 exhibited strong antibacterial activity againstBacillus cereus, Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Proteus mirabilis, Corynebacterium diphtheriaeandPseudomonas aeruginosa.

ISSN:1057-5634    

DOI:10.1080/10575639808048277

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

On further phytochemical investigation of the aerial parts ofVerbascum undulatum, a new iridoid glycoside, 6-O-[3-O-(trans-feruloyl)-α-L-rhamnopyranosyl] aucubin (1) and a new verbascoside derivative, 6-O-acetyl-martynoside (2) were isolated. These structures were determined by spectral methods, mainly by 1D and 2D NMR spectroscopy.

ISSN:1057-5634    

DOI:10.1080/10575639808048278

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Two new compounds, laipol and isolaipol, were isolated fromGlycosmis cf. cyanocarpa(Rutaceae). Their structures were determined by different spectroscopical techniques as (4R, 7′S)-(1′E, 3′E)- and (1′E, 3′Z)-4-(7-hydroxy-3-methylocta-1,3-dienyl)-3,5,5-trimethyl-2-cyclohexenone. the absolute configuration of laipol was determined by circular dichroism (4R) and the kinetic method of Horeau (7′S). This is the first report on degraded C-18 carotenes from higher plants.

ISSN:1057-5634    

DOI:10.1080/10575639808048279

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

From the culture ofPseudomonassp. 267 obtained from the rhizosphere ofTriticumpseudobactin and pseudobactin A were isolated. These two compounds are the pyoverdins typical forPseudomonas fluorescens, which establishes the identity of the strain. In addition, two novel compounds were found in the cultural broth,viztwo 7-sulfonic acid derivatives of pseudobactin A. Their structure elucidation and biogenetic implications will be presented.

ISSN:1057-5634    

DOI:10.1080/10575639808048280

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Inhibition of acetylcholinesterase (AChE) activity by 5 kinds of volatile α, β-unsaturated ketones was studied. Inhibition of AChE was measured by the colorimetric method. α-Ionone showed the strongest inhibition.

ISSN:1057-5634    

DOI:10.1080/10575639808048281

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Nine hederagenin saponins including seven new, isolated fromPometia eximiaHook. f. of the family Sapindaceae have been tested for molluscicidal activity againstBiomphalaria glabrata, one of the snail vectors of schistosomiasis (bilharziasis).

ISSN:1057-5634    

DOI:10.1080/10575639808048282

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

An efficient method for the synthesis of methyl 12α-hydroxy-isocopal-13(14)en-15-oate (2), a key intermediate to a variety of sesterterpene marine sponge metabolites, is described.

ISSN:1057-5634    

DOI:10.1080/10575639808048283

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor