Abstract: Compounds useful in the treatment of Alzheimer's disease, senile dementia, or memory disorders which have the formula ##STR1## in which R represents a hydrogen atom, a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing up to 8 carbon atoms, possibly substituted by a free or esterified carboxy radical or R represents an aralkyl radical containing up to 10 carbon atoms and R' represents a linear or branched, saturated or unsaturated, alkyl radical, containing up to 8 carbon atoms, a radical --COalk.sub.1 or a radical --(CH.sub.2).sub.2 N(alk.sub.2).sub.2, alk.sub.1 and alk.sub.2 representing an alkyl radical containing up to 8 carbon atoms, as well as their addition salts with acids. Also compositions containing the same, method of preparation and method of treatment using the same.

Abstract: Compounds useful in the treatment of Alzheimer's disease, senile dementia, or memory disorders which have the formula ##STR1## in which R represents a hydrogen atom, a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing up to 8 carbon atoms, possibly substituted by a free or esterified carboxy radical or R represents an aralkyl radical containing up to 10 carbon atoms and R' represents a linear or branched, saturated or unsaturated, alkyl radical, containing up to 8 carbon atoms, a radical --COalk.sub.1 or a radical --(CH.sub.2).sub.2 N(alk.sub.2).sub.2, alk.sub.1 and alk.sub.2 representing an alkyl radical containing up to 8 carbon atoms, as well as their addition salts with acids. Also compositions containing the same, method of preparation and method of treatment using the same.

Abstract: Compounds useful in the treatment of Alzheimer's disease, senile dementia, or memory disorders which have the formula ##STR1## in which R represents a hydrogen atom, a linear, branched or cyclic alkyl radical, saturated or unsaturated, containing up to 8 carbon atoms, possibly substituted by a free or esterified carboxy radical or R represents an aralkyl radical containing up to 10 carbon atoms and R' represents a linear or branched, saturated or unsaturated, alkyl radical, containing up to 8 carbon atoms, a radical --COalk.sub.1 or a radical --(CH.sub.2).sub.2 N(alk.sub.2).sub.2, alk.sub.1 and alk.sub.2 representing an alkyl radical containing up to 8 carbon atoms, as well as their addition salts with acids. Also compositions containing the same, method of preparation and method of treatment using the same.

Abstract: Compounds of the formula (I): ##STR1## in which R.sub.1 represents alkoxy containing from 1 to 8 carbon atoms, and R represents hydrogen or alkyl containing from 1 to 8 carbon atoms, as well as their alkali metal, alkaline-earth metal, ammonium or amine salts, which are useful in the treatment of hyperchlorhydria, gastric or gastroduodenal ulcers, gastritis, hiatal hernias, or gastric or gastroduodenal ailments accompanied by gastric hyperacidity. Also, therapeutic compositions containing the same and method of treating patients suffering from these ailments.