Compounds of formula I ##STR1## wherein R is diethoxymethyl, R.sub.1 is hydrogen, R.sub.2 is pyrid-3-ylmethyl and R.sub.3 is hydrogen, or R is cyclohexylmethyl, R.sub.1 is hydrogen and R.sub.2 is quinolin-4-ylmethyl, or R.sub.1 is hydroxy and R.sub.2 is 3,4-methylenedioxybenzyl, 1-(3,4-methylenedioxyphenyl)ethyl, and R.sub.3 is hydrogen, or R is benzyl, R.sub.1 is hydroxy, R.sub.2 is 1-(3,4-methylenedioxyphenyl)ethyl, and R.sub.3 is hydrogen, and salts thereof have GABA.sub.B -antagonistic properties and can be used for the treatment of diseases responsive to GABA.sub.B -antagonists.
化合物的结构式为I ##STR1## 其中,R为二乙氧甲基,R.sub.1是氢,R.sub.2是
吡啶-3-基甲基,R.sub.3是氢,或R为环己基甲基,R.sub.1是氢,R.sub.2是
喹啉-4-基甲基,或R.sub.1是羟基,R.sub.2是3,4-亚甲二氧基苄基,1-(3,4-亚甲二氧基苯基)乙基,R.sub.3是氢,或R是苄基,R.sub.1是羟基,R.sub.2是1-(3,4-亚甲二氧基苯基)乙基,R.sub.3是氢,以及其盐具有
GABA.sub.B-拮抗作用,可用于对
GABA.sub.B-拮抗剂响应性疾病的治疗。