Compounds formula (I): ##STR1## in which: R.sup.1 represents a hydrogen atom, an alkyl group, a substituted alkyl group, a C.sub.2 -C.sub.6 alkenyl group, an aryl group, a substituted aryl group or an alkoxycarbonyl group wherein the alkoxy part has from 1 to 6 carbon atoms; R.sup.2 represents a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group or a C.sub.3 or C.sub.4 alkenyl group; R.sup.3 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group; R.sup.4 represents a hydroxy group, a C.sub.1 -C.sub.21 aliphatic acyloxy group or a carbocyclic aryl carboxylic acyloxy group; R.sup.5 represents a C.sub.1 -C.sub.12 alkyl group, a C.sub.1 -C.sub.6 alkoxy group, a hydroxy group, a C.sub.1 -C.sub.7 aliphatic acyloxy group or a carbocyclic aryl carboxylic acyloxy group; R.sup.6 represents a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group or a C.sub.1 -C.sub.6 alkoxy group; and n is 0, 1, or 2; and pharmaceutically acceptable salts thereof are valuable in the treatment of circulatory disorders and allergies.
化合物式(I):##
STR1## 其中: R.sup.1 代表
氢原子、烷基、取代烷基、C.sub.2-C.sub.6
烯基、芳基、取代芳基或烷
氧羰基,其中烷
氧部分具有1至6个
碳原子;R.sup.2 代表
氢原子、C.sub.1-C.sub.6 烷基或C.sub.3或C.sub.4
烯基;R.sup.3 代表
氢原子或C.sub.1-C.sub.6 烷基;R.sup.4 代表羟基、C.sub.1-C.sub.21
脂肪族酰
氧基或
环烷基芳基
羧酸酰
氧基;R.sup.5 代表C.sub.1-C.sub.12 烷基、C.sub.1-C.sub.6 烷
氧基、羟基、C.sub.1-C.sub.7
脂肪族酰
氧基或
环烷基芳基
羧酸酰
氧基;R.sup.6 代表
氢原子、C.sub.1-C.sub.6 烷基或C.sub.1-C.sub.6 烷
氧基;n 为0、1或2;以及其药学上可接受的盐在治疗循环障碍和过敏方面具有价值。