The i.p. LD50 values of goniodomin A, a novel polyether macrolide, in male ICR mice were 1.2 and 0.7 mg/kg at 24 and 48 hr, respectively. Histologically, perihepatitis, non-fatty vacuoles in the hepatocytes, central necrosis of the liver and massive necrosis of lymphocytes, in the cortical layer of the thymus, were prominent.
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