| 摘要 |
Compounds of the general formula: <IMAGE> and non-toxic physiologically acceptable salts thereof, in which R1 is a halogen atom or a group NR2R3; R2 and R3, which may be the same or different, are hydrogen or (C1-C6) straight or branched chain alkyl or R2 and R3 may, together with the nitrogen atom, form a 5 or 6 membered heterocyclic ring which may contain a further hetero atom selected from O, N or S; or R2 may be hydrogen and R3 may by group R4CO or R4SO2 where R4 is hydrogen or alkyl (C1-4); R5 is hydrogen or one or more halogen atoms or hydroxy or alkoxy (C1-4) groups; and X is CH2, O or a group NR6 where R6 is hydrogen or alkyl (C1-4). These compounds block beta -adrenoreceptors. |
