The bioassay-guided separation of a Malagasy plant, Agelaea pentagyna, led to the isolation of a flavonoid, tricin (1), with potent inhibitory activity toward exocytosis from antigen-stimulated rat leukemia basophils (RBL-2H3). The structure-activity relationships among structurally related natural and synthetic flavonoids are also discussed.
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Kuwabara et al. (2003) studied this question.
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