摘要:

G.Fujikuroi(Wild Strain Imi 58289), Incubated On Calcium Lactate As Carbon Source, Excreted The Diterpenoid Gibelactol, Which May Be The Biosynthetic Precursor Of Fujenal. The Quantity And Pattern Of Gibberellins And Ent-Kaurenoids Excreted By This Fungus Were Considerably Altered When Either The Stirring Rate Or The Carbon Source Of The Culture Medium Was Modified.

ISSN:1057-5634    

DOI:10.1080/10575639208048905

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Dasytrichone, A Novel Flavone With An Unusual A-Ring Substitution Pattern Was Isolated From The Stems And Leaves OfDasymaschalon TrichophorumMerr. (Family Annonaceae). Its Structure Was Established By Spectroscopic Methods And Single Crystal X-Ray Crystallography. Dasytrichone Inhibits The Metabolism Of The Carcinogen Benzo[A]Pyrene By Hamster Embryo Cell Cultures, Suggesting That It Warrants Further Evaluation As A Potential Chemopreventive Agent.

ISSN:1057-5634    

DOI:10.1080/10575639208048906

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The 6-Exo Free Radical Cyclization Of The Carbohydrate Derivative 5 Gives In High Yield And Moderate Diastereomeric Excess The Carbocycle 4 Which Has Been Transformed Into A 1α, 25-Dihydroxy-19-Nor-Vitamin D3A-Ring Synthon.

ISSN:1057-5634    

DOI:10.1080/10575639208048907

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Two Novel Tricyclic Norsesterterpene Acids, Conulosin-A (4) And Conulosin-B (5), Have Been Isolated From An Australian Marine Sponge,Latrunculia Conulosa.Both Conulosin-A (4) And Conulosin-B (5) Were Unstable And Were Characterised As Their Methyl And Ethyl Esters Respectively.

ISSN:1057-5634    

DOI:10.1080/10575639208048908

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

An Allylsilane-Based Annulation Was Used To Construct A Functionalized Perhydroazulene. The C(1), C(5) And C(10) Stereocenters, Characteristic Of The Helenanolides, Were Established Using A Reductive Alkylation Strategy. Stereo-Selective Syntheses Of Two Pseudoguaianolides Were Achieved.

ISSN:1057-5634    

DOI:10.1080/10575639208048909

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The Gentiobiosides3,9,13,17And20, The First Anthraquinonoid Disaccharides From Basidiomycetes, Are Isolated From Lyophilized Basidiomes Of The Australasian FungusDermocybe SplendidaHorak And Their Structures Are Determined By Spectroscopic And Chemical Methods.

ISSN:1057-5634    

DOI:10.1080/10575639208048910

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Four Novel Diterpenes, Cyanthiwigin A-D (1–4) Have Been Isolated From The Marine SpongeE. ReiswigiAnd Their Structure Elucidated By Mass And Mainly Nmr Spectra. The Tricarbocyclic Structure Of 1 Was Confirmed By An X-Ray Analysis And Its Absolute Configuration Was Established To Be 4s, 5r, 6s, 9s By The Modified Mosher's Method. The Four Compounds Have The Same Planar Skeleton As Cyanthin But Differ In Their Stereochemistry.

ISSN:1057-5634    

DOI:10.1080/10575639208048911

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

New Fatty Acids 5,9,25-Triacontatrienoic, 9,23-Triacontadienoic And 23-Triacontenoic Were Identified In Phospholipids Of The Marine SpongeTrikentrion LoeveCarter. Double Bond Positions Were Determined By Gas Chromatography-Mass Spectrometry Analysis Of The Corresponding N-Acyl Pyrrolidides.

ISSN:1057-5634    

DOI:10.1080/10575639208048912

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Intramolecular Radical Cyclization Of Adducts Arising From Cohalogenation Of Methyl Vinyl Ketone (Nbs/Propargyl Alcohol) Constitutes An Efficient Stereoselective Route To Botryodiplodin Derivatives.

ISSN:1057-5634    

DOI:10.1080/10575639208048913

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

6-Desoxy-6-Nitrodaunomycinone (1b), Daunomycinone (1f) And The Novel (±)-11-Amino-6,11-Didesoxy-6-Nitrodaunomycinone (1g) Have Been Synthesized In 7,8 And 8 Steps Respectively From The Dihydroxy Ester (3a); The Addition Of Nitromethane To (3a) Works Efficiently Only When The Hydroxyls Are Equatorial.

ISSN:1057-5634    

DOI:10.1080/10575639208048914

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor