Among a series of benzimidazolinone derivatives, KF-4942 was examined on its mode of hypotensive action. It was found that KF-4942 was a potent hypotensive agent, and that the hypotension was produced mostly by alpha-adrenergic blockade. Alpha-adrenergic blocking action of KF-4942 was suggested to be selective to the postsynaptic receptor. Thus, KF-4942 was concluded to be an agent with properties similar to prazosin.

中文翻译：

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新型苯并咪唑啉酮衍生物threo-1-（2-羟基-2-（3,4,5-三甲氧基苯基）-1-甲基乙基）-4-（1,3-二氢-2H-苯并咪唑-2- -1-基）哌啶（KF-4942）：类似于哌唑嗪的作用方式。

在一系列苯并咪唑啉酮衍生物中，检查了KF-4942的降压作用模式。发现KF-4942是有效的降压药，而低血压主要是由α-肾上腺素能阻滞引起的。KF-4942的α-肾上腺素阻断作用被认为对突触后受体具有选择性。因此，KF-4942被认为是一种具有类似于哌唑嗪性质的药物。