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.
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