| 摘要 |
Compounds of the formula <IMAGE> I wherein R1 represents hydroxy, alkyl, aralkyl, aralkoxy-alkyl, hydroxy-alkyl, amino-alkyl, acylamino-alkyl, monoalkylamino-alkyl, dialkylamino-alkyl, alkoxycarbonylamino-alkyl, halo-alkyl, carboxy-alkyl, alkoxycarbonyl-alkyl, alkoxy or aralkoxy; R2 and R3 each represent hydrogen, alkyl or aralkyl; R4 and R5 each represent hydrogen or R4 and R5 together represent oxo; and X represents an oxygen atom or the group -NR6- in which R6 represents hydrogen, alkyl or aralkyl or -(CH2)n- in which n stands for zero, 1 or 2, and racemates, enantiomers, diastereoisomers or pharmaceutically acceptable salts thereof have antihypertensive activity and can be used as medicaments in the form of pharmaceutical preparations. They can be prepared according to known methods. Compounds useful as starting materials for producing the compounds of formula I are also provided. |
