Described are compounds of the formula ##STR1## wherein R is hydrogen, lower alkyl, halo, cyano, hydroxy, amino, lower alkylamino, --CH.sub.2 NH.sub.2, CH.sub.2 OH or COOR"; R' is hydrogen, lower cycloalkyl or lower alkyl; R" is lower alkyl or --CH.sub.2 Ar wherein Ar is phenyl, substituted phenyl, furan or thiophene; R'" is COOR", ##STR2## and x is oxygen or nitrogen; or a pharmaceutically acceptable salt thereof and their use in the treatment of impaired ventricular myocardial contractility. The compounds exhibit cardiotonic activity.
描述了公式##STR1##的化合物,其中R是氢,低级烷基,卤素,
氰基,羟基,
氨基,低级烷基
氨基,--CH.sub.2 NH.sub.2,CH.sub.2 OH或COOR";R'是氢,低环烷基或低级烷基;R"是低级烷基或--CH.sub.2 Ar,其中Ar是苯基,取代苯基,
呋喃或
噻吩;R'"是COOR",##STR2##和x是氧或氮;或其药学上可接受的盐,并且它们可用于治疗心室肌收缩力受损。这些化合物表现出强心活性。