摘要:

Two new C13-norisoprenoids, (3S,4S,5R,6R)*−3,4,6-tri-hydroxy-5,6-dihydro-β-ionol (1) and (3S,5R,6R)*-3,5,6-trihydroxy-5,6-dihydro-β-ionol (2), were isolated from the leaves ofApollonias barbujana(Lauraceae). Their structures were determined on the basis of spectroscopic analysis.

ISSN:1057-5634    

DOI:10.1080/10575639608043230

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Two new phenylpropene disaccharides 3-[4′-O-β-D-apiosyl-(1″′ → 3″) -O-β-D-glucopyranosyl-3′, 5′-dimethoxyphenyl]-2-trans-propene-1-ol (1) and 3-[4′-O-β-D-glucosyl-(1″′ → 5″)-O-β-D-apiosyl-3′, 5′-dimethoxyphenyl]-2-trans- propene-1-ol (2) were isolated fromT. cordifoliaand screened for immunostimulant activity. The structures were elucidated on the basis of spectroscopic evidences.

ISSN:1057-5634    

DOI:10.1080/10575639608043231

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Two new natural benzoquinones, 2,5-dihydroxy-3-methyl-6-undecyl-1,4-benzoquinone (1, muketanin) and 2-O-methyl-muketanin (2) have been isolated from fruits ofMyrsine africanaandMaesa lanceolatarespectively.

ISSN:1057-5634    

DOI:10.1080/10575639608043232

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Isonitenin (1), a new C-21 difuranoterpene and the new alkaloid acetylhomoagmatine (4) were isolated fromSpongia officinalisandCliona celata. respectively. The absolute stereochemistry of isonitenin (1) was proposed as 9R and that of dihydronitenin (3) as 7R and 9R.

ISSN:1057-5634    

DOI:10.1080/10575639608043233

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

A new lignan (+)-myrisfragransin was isolated from the seed ofMyristica fragrans.

ISSN:1057-5634    

DOI:10.1080/10575639608043234

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Taxagifine (1), an unusual taxane isolated fromTaxus baccataandTaxus cuspidata(Taxaceae), has been efficiently transformed through C-13 reduction and acylation into the novel paclitaxel (Taxol®) / docetaxel (Taxotere®) derivative 5.

ISSN:1057-5634    

DOI:10.1080/10575639608043235

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The novel derivative 1α-hydroxy-6β-propionyloxy-9-oxo-10αH-furanoeremophilane was isolated fromSenecio hualtaranensistogether with two known furanoeremophilanes and two pyrrolizidine alkaloids. From the closely related speciesS. fabrisiithe same alkaloids were obtained, but in this case sesquiterpenes were not isolated. The phytochemical analysis of another three species of theSeneciogenus is also reported.

ISSN:1057-5634    

DOI:10.1080/10575639608043236

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The leaves ofRhamnus serrataSchultez var.serratayielded nonacosane, β-sitosterol and the anthraquinone emodine, while the roots afforded 7-hydroxy-5-methoxyphtalide, the anthraquinones emodine, physcion and chrysophanol, the known chromone eugenine and the new 3,5-dihydroxy-7-methoxy-2-methylchromone.

ISSN:1057-5634    

DOI:10.1080/10575639608043237

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Aposphaerin A and B, two new chroman-4-ones, have been isolated from the endophytic fungusAposphaeriasp.

ISSN:1057-5634    

DOI:10.1080/10575639608043238

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Novel indole alkaloids of the aspidosperma-type,viz., voafinidine and voalenine were obtained in minor amounts from the leaf extract ofTabernaemontana divaricata(double flower variety). The structures of these alkaloids were elucidated by spectral methods.

ISSN:1057-5634    

DOI:10.1080/10575639608043239

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor