Compounds are described of the formula ##STR1## wherein R.sub.1 and R.sub.4 independently represent a C.sub.1-4 alkyl group; R.sub.2 and R.sub.3 independently represent a C.sub.1-6 straight or branched alkyl chain which may be interrupted by an oxygen atom; R.sub.5 represents a straight or branched chain C.sub.1-13 alkyl group or a C.sub.5-8 cycloalkyl group which may be substituted by a C.sub.1-3 alkyl substitutent; The compounds represented by formula (I) reduce intracellular calcium ion concentration by limiting transmembranal calcium ion influx and thus may be useful for the treatment of cardiovascular disorders such as hypertension.
化合物的式子为##STR1##其中R.sub.1和R.sub.4分别独立表示C.sub.1-4烷基;R.sub.2和R.sub.3独立表示C.sub.1-6直链或支链烷基链,可能被氧原子中断;R.sub.5表示直链或支链C.sub.1-13烷基或C.sub.5-8环烷基,可能被C.sub.1-3烷基取代。式(I)表示的化合物通过限制跨膜
钙离子通量来降低细胞内
钙离子浓度,因此可用于治疗心血管疾病,如高血压。