摘要:

One new furanosesquiterpene (1) was isolated from root barks ofBursera leptophloeos.The structure of this sesquisterpenoid was elucidated from spectral data.

ISSN:1057-5634    

DOI:10.1080/10575639608044909

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Two novel bioactive acetogenins, 4-acetyl annonacin (1) and 4-acetyl xylomaticin (2), were isolated from the leaves and twigs ofAsimina longifoliaK. (Annonaceae) by directing the fractionation with the brine shrimp lethality test. 1 and 2 each has a mono-tetrahydrofuran (THF) ring with two flanking hydroxyl groups and an α, β-unsaturated γ-lactone with a 4-acetoxyl. The presence of acetoxyl groups is a feature rarely found in the Annonaceous acetogenins. 1 and 2 showed potent and selective cytotoxicities among six human tumor cell lines.

ISSN:1057-5634    

DOI:10.1080/10575639608044910

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Insecticidal alkaloid, (−)-canadine was isolated under bioassay guide ofDrosophila melanogasterMeigen. from MeOH extract of tubers of Corydalis bulbosa. Insecticidal activity against larvae; (−)-canadine showed 99.7% of larvae were dead at 1.40 μ mol/ml diet concentration, and the LC50value was 0.9 μmol/ml diet concentration. Acute toxicity against adults; (−)-canadine showed 75% of adults were dead at 5.0 μg /adult, and the LD50value was 2.5μg/adult.

ISSN:1057-5634    

DOI:10.1080/10575639608044911

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

3,7-dimethyl-l,6,7-octanetriol was obtained on the microbial transformation of citronellol using plant pathogenic fungus,Glomerella cingulataas a biocatalyst.

ISSN:1057-5634    

DOI:10.1080/10575639608044912

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

(−)-7-epi-Deoxynupharidine was isolated as an insecticidal alkaloid by bioassay-guided fractionation from MeOH extract of rhizomes ofNuphar japonicumDC. Insecticidal activity against larvae ofD. melanogaster, (−)-7-epi-deoxynupharidine showed that 48.3% of larvae were dead at 4.29μmol/ml diet concentration, and the LC50value was 4.33μmol/ml diet concentration. Acute toxicity against adults ofD. melanogaster, (−)-7-epi-deoxynupharidine showed that 80% of adults were dead at 1.0μg/adult, and the LD50value was 0.86μg/adult.

ISSN:1057-5634    

DOI:10.1080/10575639608044913

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

During an investigation of the base-induced transformation of secoisopimarene 1 to gibberellin analog 2, an unexpected solvent-specific cyclization occurred generating a bicyclo[3.2.1]spirodiketone of an unexpected structure class. The structure of this interesting reaction product has been fully defined using comprehensive 2D NMR methods.

ISSN:1057-5634    

DOI:10.1080/10575639608044914

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Tandem acylation - cycloalkylation of 3,4 - dimethoxy-phenylethylamine (1) with cyclohexene -1-acetic acid (2) in polyphosphoric acid (PPA) afforded 8 - (2 - aminoethyl) - 1,2,3,4,4a,9,10,10a - octahydro - 9 - oxo - phenanthrene (3) which on dehydrogenation with Pd - C, followed by sequentialN- methylation gaveN- noratherosperminine (5) and atherosperminine (6) in good yields.

ISSN:1057-5634    

DOI:10.1080/10575639608044915

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1057-5634    

DOI:10.1080/10575639608044898

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor