Heterocyclic-substituted quinolone inotropic agents

Abstract From the Canadian patent

9387-72, Abstract, A quinolone inotropic agent of the formula:- (I), or a pharmaceutically acceptable salt thereof wherein "Het" is an optionally substituted 5-membered monocyclic aromatic heterocyclic group containing at least one nitrogen atom in the aromatic ring and attached by a nitrogen atom of said ring to the 5-, 6-, 7- or 8-position of said quinolone; R, which i9 attached to the 5-, 6-, 7- or 8-position is, hydrogen, C1-C4 alkyl, C1-C4 alkoxy hydroxy, CF3, halo, cyano or, hydroxymethyl; and the dashed line between the 3- and 4-positions represents an optional bond.