CUCURBITACINS FROM CUCURBITA-TEXANA - EVIDENCE FOR THE ROLE OF ISOCUCURBITACINS

被引：15

作者：

HALAWEISH, FT

机构：

[1] Delaware Agricultural Experiment Station Department of Entomology, and Applied Ecology College of Agricultural Sciences, University of Delaware, Newark, 19717-1303, Delaware

来源：

JOURNAL OF CHEMICAL ECOLOGY | 1993年 / 19卷 / 01期

关键词：

CUCURBITA-TEXANA; CORN ROOTWORM; PHAGOSTIMULANT; CUCURBITACIN-D; ISOCUCURBITACIN; GLYCOSIDES;

D O I：

10.1007/BF00987468

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In addition to cucurbitacins E and I, cucurbitacins D, 1, 3-epi-isocucurbitacin D, 2, and B, 3, were isolated from the fruits of Cucurbita texana and structurally identified by UV, IR, H-1 NMR, C-13 NMR, and MS, and 2-O-beta-glucopyranosylcucurbitacin I was identified. These compounds have not been reported PreviouslY as constituents of this species. The isolation of 3-epi-isocucurbitacin D 2 together with normal cucurbitacins suggests that isocucurbitacins occur naturally. Evidence is also discussed that isocucurbitacins are biosynthesized one step ahead of normal cucurbitacin.

引用

页码：29 / 37

页数：9

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