PURPOSE: An antitumor agent having an inhibitory action on secretion of neutral acid in the stomach which has never existed, containing 3-(2'-pyridyl)-1,2,4- triazin-5-one well-known as an agricultural fungicide or a herbicide as an active ingredient.
CONSTITUTION: An antitumor agent containing 3-(2'-pyridyl)-1,2,4-triazin-5-one shown by the formula as an active ingredient. The compound shown by the formula has an inhibitory action on secretion of neutral acid in the stomach, and strong antitumor action. The compound shown by the formula can select various forms of drug preparation (e.g., tablet, capsule, injection, etc.). A dose is preferably 0.6W50mg/kg/day. 10W1,000mg active component is preferably contained in an administration unit form.
HARA NOBUYUKI
KIRINO OSAMU
SUMITOMO CHEMICAL CO
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