4,5-Dihydro-[1H]-benz[g]indazole-3-carboxylic acid derivatives represented by the following formula, or their salts, have excellent antagonism to endothelin receptors and are useful as preventives or remedies for diseases such as hypertension, angina pectoris, myocardial infarction, brain infarction, cerebrovascular contraction, renal insufficiency, hepatic dysfunction, arteriosclerosis and post-PTCA restenosis.
wherein Ar represents an optionally substituted aryl group, and R1 represents a hydrogen atom, an optionally substituted lower alkyl group, an optionally substituted aryl group, an optionally substituted cycloalkyl group or an optionally substituted heterocyclic group.
以下公式所示的4,5-二氢-[1H]-苯并[g]
吲唑-3-羧酸衍
生物或其盐,具有优异的内皮素受体拮抗作用,并可用作预防或治疗高血压、心绞痛、心肌梗塞、脑梗塞、脑血管收缩、肾功能不全、肝功能障碍、动脉硬化和P
TCA后再狭窄等疾病的药物。其中,Ar代表可选取代的芳基基团,R1代表氢原子、可选取代的低碳基基团、可选取代的芳基基团、可选取代的环烷基团或可选取代的杂环基团。