| abstract |
This invention provides compounds of formula I, <IMAGE> I wherein R1 is phenyl; phenyl monosubstituted with fluorine; phenyl mono- or disubstituted with chlorine; phenyl mono-, di- or trisubstituted with methyl or methoxy, secondary 1-phenoxyalkyl, the secondary alkyl residue of which is of 3 to 5 carbon atoms and in which the phenyl residue is unsubstituted or monosubstituted with chlorine, and either R2 is hydrogen, and R3 is methyl, or R2 is methyl and R3 is hydrogen or methyl, which are useful, for example, for treating coronary conditions. |