Pharmaceutical dosage unit compositions containing as an active ingredient a compound of the formula ##STR1## wherein R.sub.1 is hydrogen, lower alkanoyl, benzoyl or halobenzoyl,R.sub.2 is hydrogen, chlorine or bromine,R.sub.3 is carboxyl or lower carbalkoxy, andR.sub.4 and R.sub.5 are each hydrogen, alkyl of 1 to 5 carbon atoms, mono- or di-hydroxy-(alkyl of 1 to 5 carbon atoms), alkenyl or 2 to 4 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, mono- or di-hydroxy-(cycloalkyl of 5 to 7 carbon atoms) or benzyl,Or a non-toxic, pharmacologically acceptable acid addition salt thereof; and a method of using the same as anti-ulcerogenics, secretolytics, antitussives, and stimulants of the production of the surfactant or antiatelectasis factor of the alveoli.