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Porritoxins, metabolites of Alternaria porri, as anti-tumor-promoting active compounds
- M. Horiuchi, H. Tokuda, K. Ohnishi, M. Yamashita, H. Nishino, T. Maoka
- Chemistry, BiologyNatural Product Research
- 1 February 2006
Primary screening of metabolites of Alternaria porri by examining their possible inhibitory effects on Epstein-Barr virus early antigen activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells showed the inhibitory effect of porritoxin and was superior to that of β-carotene, a well-known anti-tumor promoter.
Porritoxin, a phytotoxin of Alternaria porri
Reinvestigation of structure of porritoxin, a phytotoxin of Alternaria porri.
The structure of porritoxin, a phytotoxin of Alternaria porri, was reinvestigated by detailed 2D NMR analysis and the previous proposed structure, 8-(3',3'-dimethylallyloxy)-10-methoxy-9-methyl-1H-3,4-dihydro-2,5-benzoxazocin-6(5H)-one, is incorrect.
A Novel Isoindoline, Porritoxin Sulfonic Acid, from Alternaria porri and the Structure-phytotoxicity Correlation of Its Related Compounds
- M. Horiuchi, K. Ohnishi, Yasumasa Yamada
- ChemistryBioscience, biotechnology and biochemistry
- 1 January 2003
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…
Structure of Porriolide, a New Metabolite from Alternaria porri.
- R. Suemitsu, K. Ohnishi, M. Horiuchi, Y. Morikawa, Y. Sakaki, Y. Matsumoto
- Political ScienceBioscience, biotechnology and biochemistry
- 23 February 1993
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Rapid and simultaneous determination of tetra cyclic peptide phytotoxins, tentoxin, isotentoxin and dihydrotentoxin, from Alternaria porri by LC/MS
In the course of our investigation on bioactive products of Alternaria porri , the causal fungus of black spot disease in the stone− leek and onion, we have reported the isolation of cyclic tetra…
Isolation and Identification of 6-(3',3'-Dimethylallyloxy)-4-methoxy-5-methylphthalide from Alternaria porri.
- R. Suemitsu, K. Ohnishi, M. Horiuchi, Y. Morikawa
- ChemistryBioscience, biotechnology, and biochemistry
- 23 June 1992
This work isolated 6-(3′,3′-Dimethylallyloxy)-4-methoxy-5-methylphthalide from Alternaria porri using a high-resolution X-ray diffraction analysis and identified five new polypeptide racemates, three of which were new to the literature and had never been isolated before.
High-performance liquid chromatographic determination of tentoxin in fermentation of Alternaria porri (Ellis) Ciferri
Isolation and Identification of Tentoxin from Alternaria porri (Ellis) Ciferri