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The hypoglycemic activity of glycyrrhizic acid (GA, I), its trisodium (II) and sodium-dilithium salts (III), and a conjugate with L-methionine methyl ester (IV) was studied using an alloxan diabetes model after peroral administration to male Wistar rats. It was found that GA and its conjugate IV at a dose of 100 mg/kg exhibited hypoglycemic activity and reduced the blood glucose content of the animals by 35.5 and 42.6%, respectively, after 120 min. GA conjugate IV had low toxicity and hypoglycemic activity superior to those of GA and acarbose.

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1,3-Dimethyl-5-nitro-5-hexahydropyrimidinyl)propionic acid methyl ester (I) was obtained with a 83% yield using a Mannich type reaction of 4-nitrobutanoic acid methyl ester with excess formalin and methylamine. It was found that compound I possesses low toxicity and shows antiarrhythmic activity on models of arrhythmia induced by intravenous injections of calcium chloride and aconitine in rats.