The invention concerns benzoquinolizines of formula
and their acid addition salts. In the formula R7 is lower alkyl or a phenyl or naphthyl radical optionally substituted with specified substituents and R8 is methyl or ethyl. The compounds possess high presynaptic a-adrenoceptor antagonistic activity and a good presynaptic/postsynaptic antagonistic selectivity.
本发明涉及式
及其酸加成盐。式中,R7 是低级烷基或任选被特定取代基取代的苯基或
萘基,R8 是甲基或乙基。这些化合物具有较高的突触前 a-
肾上腺素受体拮抗活性和良好的突触前/突触后拮抗选择性。