Compounds having activity against chronic obstructive airway disease or cardiac disease, characterized by the formula ##STR1## wherein R.sup.1 is n-propyl, n-butyl, isobutyl, n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexylmethyl, and R.sup.2 is hydrogen or methyl, provided that R.sup.2 is methyl when R.sup.1 is n-propyl, n-butyl or isobutyl, or a physiologically acceptable salt thereof.
具有对慢性阻塞性气道疾病或心脏疾病活性的化合物,其特征在于其
化学式为##
STR1##其中R1为n-丙基,n-丁基,异丁基,n-戊基,
2-甲基丁基,3-
甲基丁基,
2,2-二
甲基丙基,环丙基,
环丁基,环戊基或
环己基
甲基,R2为
氢或
甲基,但当R1为n-丙基,n-丁基或异丁基时,R2为
甲基,或其生理上可接受的盐。