Compounds of the formula ##STR1## wherein: Het is imidazol-1-yl or 1,2,4-triazol-1-yl; py is 2-, 3-, or 4-pyridyl; R and R.sub.2 are H or alkyl; R.sub.1 is H, alkyl or vicinal R.sub.1 groups from a C--C double bond; and x is 0 or 1; or a pharmaceutically acceptable salt thereof, and pharmaceutical compositions including the same for cardiotonic uses and methods of treating congestive heart failure.
分子式为##STR1##的化合物,其中: Het为
咪唑-1-基或
1,2,4-三唑-1-基; py为2-,3-或4-
吡啶基;R和R.sub.2为H或烷基;R.sub.1为H,烷基或来自C- C双键的邻R.sub.1基团;x为0或1;或其药学上可接受的盐,以及包括这些化合物的制药组合物,用于心脏强心作用和治疗充血性心力衰竭的方法。