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The dichloromethane extract of the stem of jacaranda filicifolia Don. showed inhibitory activity in vitro against soybean 5-lipoxygenase. Systematic fractionation to isolate the compounds responsible resulted in the isolation of three active compounds, 2 alpha, 3 alpha-dihydroxyurs-12-en-28-oic acid, beta-sitosterol, and one of which was new which was characterised as 2-(4-hydroxyphenyl)ethyl 1-dodecyloctadecanoate. This type of compound has not previously been reported to inhibit lipoxygenase.
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Ali et al. (1999) studied this question.
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