A Novel Isoindoline, Porritoxin Sulfonic Acid, from Alternaria porri and the Structure-phytotoxicity Correlation of Its Related Compounds

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  • HORIUCHI Masayuki
    <i>Research Institute for Production Development</i>
  • OHNISHI Keiichiro
    <i>Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University</i>
  • IWASE Noriyasu
    <i>Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University</i>
  • NAKAJIMA Yoshikazu
    <i>Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University</i>
  • TOUNAI Kenji
    <i>Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University</i>
  • YAMASHITA Masakazu
    <i>Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University</i>
  • YAMADA Yasumasa
    <i>Department of Food Science and Nutrition, Doshisha Women's College of Liberal Arts</i>

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  • Novel Isoindoline Porritoxin Sulfonic Acid from Alternaria porri and the Structure phytotoxicity Correlation of Its Related Compounds
  • A Novel Isoindoline, Porritoxin Sulfonic Acid, from<i>Alternaria porri</i>and the Structure-phytotoxicity Correlation of Its Related Compounds

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  Novel zinniol-related compound 3, named porritoxin sulfonic acid, with an isoindoline skeleton was isolated from the culture liquid of Alternaria porri. The structure was determined to be 2-(2″-sulfoethyl)-4-methoxy-5-methyl-6-(3′-methyl-2′-butenyloxy)-2,3-dihydro-1H-isoindol-1-one. The phytotoxic activities of three isoindolines (1-3) were evaluated in a seedling-growth assay against stone leek and lettuce.<br>

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