Compounds of the general formula: ##SPC1## In which: R.sub.1 and R.sub.2 which may be the same or different, represent a hydrogen atom or an alkyl group which may optionally be substituted by an aryl group, or represents an alkanoyl, aroyl or alkanesulphonyl group; R.sub.3 represents a hydrogen atom, or an alkyl group which may optionally be substituted by an aryl group, or represents an alkenyl, aryl or alkylthio group; R.sub.4 represents a hydrogen atom or an alkyl group; and R.sub.5 represents a hydrogen atom or an aryl or alkyl group, which alkyl group may optionally be substituted by a cycloalkyl group; And physiologically acceptable salts and derivatives thereof and addition products formed by nucleophilic addition. These compounds act as spasmolytics and phosphodiasterase inhibitors and have cardiotonic and diuretic properties. They are also of use in the treatment of skin disorders and gout.
通式为##
SPC1##的化合物:其中,R.sub.1和R.sub.2可能相同也可能不同,代表氢原子或烷基,该烷基可以被芳基取代,或代表烷酰基,芳酰基或烷基磺酰基;R.sub.3代表氢原子,或烷基,该烷基可以被芳基取代,或代表烯基,芳基或烷
硫基;R.sub.4代表氢原子或烷基;R.sub.5代表氢原子或芳基或烷基,该烷基可以被环烷基取代;以及生理上可接受的盐和衍
生物,以及由亲核加成形成的加成物。这些化合物作为平滑肌松弛剂和
磷酸二酯酶抑制剂,并具有心脏强心和利尿作用。它们也用于治疗皮肤疾病和痛风。