| abstract |
The present invention relates to a quinoline derivative comprising an oxygen heterocycle represented by the following formula (1), a pharmaceutically acceptable salt thereof, a preparation method thereof, and a pharmaceutical composition for treating gastric ulcer.n n n n n n n n (In Formula 1, X, Rx, and Ar are as defined in the specification.)n n n Quinoline derivatives and salts thereof, including the oxygen ring of Formula 1, have a function of inhibiting gastric acid secretion in mammals, and thus may be useful as a therapeutic agent for gastric ulcer. |