| 摘要 |
A compound having the following general formula (I): <CHEM> wherein X is -(CH2)n- in which n is 1 or 2 or X is -CR4=CR5- in which R4 and R5 are independently hydrogen or lower alkyl; R and R1 are independently hydrogen or lower alkyl; R2 and R3 are independently lower alkyl or R2 and R3 are taken together with the carbon to which each is attached to form a ring containing from three to six carbon atoms. The compounds are useful as cardiotonic, antihypertensive, and antithrombotic (platelet aggregation inhibition) agents. |
