Abstract

A series of 2,3,4,5-tetrahydro-1,5-benzothiazepine and related compounds were prepared, and the intracellular Ca2+ inhibitory effects were examined using methoxamine- or caffeine-induced contraction of isolated rabbit arteries. Structure-activity relationship studies of these compounds are discussed and the results suggest that novel 5-[3-[2-(3,4-dimethoxyphenyl)ethyl]aminopropionyl]-2,3,4,5- tetrahydro-1,5-benzothiazepine fumarate (20d) showed the most potent inhibitory action on the intracellular Ca2+ release.

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