Urea derivatives of the following formula: ##STR1## wherein R.sub.2 indicates a piperidino or pyrrolidino group which may be substituted with a hydroxy group or a lower alkyl group having 1 to 13 carbon atoms; A indicates an ethylene group, propylene group, butylene group or butenylene group; R.sub.2 indicates a straight or branched alkyl group having 1 to 20 carbon atoms, a benzyl group, or a phenyl group which may have 1 to 3 substituents such as a lower alkyl group having 1 to 6 carbon atoms, a lower alkoxy group having 1 to 3 carbon atoms, a halogen atom, a trifluoromethyl group, an amino group, a nitro group or a methylenedioxy group; and X indicates an oxygen or sulfur atom, as well as the hydrates and pharmaceutically acceptable salts thereof are useful antiulcer agents.
以下公式的
尿素衍
生物:## STR1 ##
其中,R.sub.2表示一个
哌啶基或
吡咯烷基,该基团可以被一个羟基或一个具有1至13个碳原子的低级烷基基团取代; A表示
乙烯基,
丙烯基,
丁烯基或
丁二烯基; R.sub.2表示一个直链或支链烷基,其具有1至20个碳原子,苯甲基或苯基,其可以具有1至3个取代基,例如具有1至6个碳原子的低级烷基基团,具有1至3个碳原子的低级烷氧基团,卤素原子,三
氟甲基基团,
氨基,硝基或亚甲二氧基基团; X表示氧原子或
硫原子,以及其
水合物和药学上可接受的盐是有用的抗溃疡剂。