| 摘要 |
A compound of formula I …<CHEM>… in which R1 is H, (C1-4) alkyl, phenyl or (C7-11)-phenylalkyl, the phenyl ring of the last two radicals being un-substituted or mono- or independently di-substituted by (C1-4)alkyl or -alkoxy or by halogen,… R2 is H, (C1-4) alkyl, phenyl or phenyl, mono- or independently di-substituted by (C1-4) alkyl or - alkoxy or by halogen and one of… R3 to R6 is H and the remaining radicals R3 to R6, independently are H, (C1-4)-alkyl or -alkoxy, hydroxy, halogen and if desired any two adjacent remaining radicals R3 to R6 represent -OCH2O-… with the proviso that at least one of the radicals R1 to R6 is other than H, or a pharmaceutically acceptable acid addition salt thereof is a useful cardiotonic agent and vasodilator in heart insufficiency and a blood platelet aggregation inhibitor. |
