| abstract |
(57) [Summary] [Structure] The following general formula (II): (In the formula, R 3 represents a hydrogen atom, a lower linear, branched or cyclic alkyl group or alkenyl group, and R 4 is optionally mono- or poly-substituted with a halogen atom, a lower alkyl group or an alkoxyl group. 1,8-naphthyridin-2 (1H) -one derivative represented by phenyl group or pyridyl group) or a pharmaceutically acceptable salt thereof, a process for producing the same, and an antiulcer containing the same as an active ingredient Agent. [Effect] The compound of the present invention is a novel compound which is not listed in the literature and can be produced by a simple method. This compound is useful as an anti-ulcer agent because it has both a gastric acid secretion inhibitory action and a gastric mucosa protective action, exhibits an anti-ulcer action, and has low toxicity. |