申请人:American Hospital Supply Corporation
                            
                            
                                公开号:US04532250A1
                            
                            
                                公开(公告)日:1985-07-30
                            
                            Described are compounds of the formula ##STR1## wherein R is heteroaryl and R.sub.1 is hydrogen or loweralkyl, or a pharmaceutically acceptable salt thereof. The compounds exhibit cardiotonic activity.
                            所述化合物的公式为##STR1##其中R为杂环芳基,R.sub.1为氢或低烷基,或其药学上可接受的盐。这些化合物表现出心脏强效活性。