Abstract
A new phytotoxic enol tautomer of 4-pyridylpyruvic acid, named ascosonchine, was isolated from the culture filtrate of Ascochyta sonchi. Such a leaf pathogen is a potential biocontrol agent of Sonchus arvensis, a perennial herbaceous weed occurring throughout the temperate regions of the world. Ascosonchine, characterised as (Z)-2-hydroxy-3-(4-pyridyl)-2-propenoic acid by spectroscopic methods, showed selective herbicidal properties, that are not associated with antibacterial, antifungal or zootoxic activities.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Ascomycota / chemistry*
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Herbicides / chemistry*
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Herbicides / isolation & purification
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Herbicides / pharmacology
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Pest Control, Biological / methods
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Plant Leaves / drug effects
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Plant Leaves / growth & development
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Pyridines / chemistry*
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Pyridines / isolation & purification
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Pyridines / pharmacology
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Pyruvic Acid / chemistry*
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Pyruvic Acid / isolation & purification
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Pyruvic Acid / pharmacology
Substances
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Herbicides
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Pyridines
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Pyruvic Acid