Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1990-07-30
1991-11-05
Robinson, Allen J.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
A01N 4316
Patent
active
050632442
ABSTRACT:
5-methoxy-7-hydroxyflavan compound (I) was isolated and purified from Dragon's Blood resin. The purification process involves 50% ethanol soxhletion overnight and then fraction through silica column with a series of solvent elution. The purified compound (I) was crystallized in benzene: hexane (1:1). The pure compound was identified by instruments including IR, NMR, FAB-MS, and GC-MS and acetylation reaction to confirm the structure. This compound was found to be a strong antifungal chemical with broad spectra against Fusarium oxysporium fsp. niveum, Phytophora capsici, Phoma asparagi, Pythium spinosum, Pythium aphanidermatum, Phthium sylvaticum, Sclerotium rolfsii, and Sclerotinia sclerotiorum . For whole plant in vivo testes, it was found that compound (I) significantly protected mung bean and cabbage from being infested and damaged by Sclerotium rolfsii and Pythium aphanidermatum respectively. Toxicology experiments with compound (I), it shown no toxcity or effect to animals by peroral 300 mg/kg or intraperitoneal 100 mg/kg (by Brion Research Institute of Taiwan). It is a definite conclusion that compound is a safe fungicide in agriculture.
REFERENCES:
Okamoto et al.; C.A. vol. 105 (1986) 94525M.
Olaniyi et al.; C.A. vol. 78(1973) 58277X
Cardillo et al.; vol. 76 (1972) 56573a.
Chang Ming-Ju
Hsu Yuan-Hsun
Kuo Mei-Hui
Soong Tai-Sen
Development Center for Biotechnology
Robinson Allen J.
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