| 摘要 |
The invension provides compounds of formula I, I wherein R1 is, for example, hydrogen or alkanoyl of 1 to 20 carbon atoms; R2 is, for example, hydrogen, hydroxy, alkanoyl of 1 to 20 carbon atoms, CF3SO2NH or CC13SO2NH; R3 is hydrogen or, when R2 is chlorine, R3 may also be chlorine; R4 is, for example, hydrogen, alkyl of 1 to 4 carbon atoms or cycloalkyl of 3 to 8 carbon atoms; and R6 is, for example, hydrogen, alkyl of 1 to 4 carbon atoms or, together with R5, a -(CH2)4-, -(CH2)5 or (CH2)6-group, which compounds possess pharmacological activity, for example in she treatment of cardiac diseases and Parkinson's disease. |
