Compounds of the formula
wherein R is primary or secondary C₁-C₈ alkyl, C₂-C₄ alkenyl-CH₂, C₃-C₈ cycloalkyl or C₃-C₆ cycloalkyl-substituted C₁-C₅ primary or secondary alkyl, the total number of carbon atoms in R not to exceed 8; R¹ is allyl, H, or C₁-C₄ straight chain alkyl, and R² is C₁-C₃ alkoxy-C₅-C₇ cycloalkyl; a primary or secondary C₁-C₃ alkoxy-C₂-C₆-alkyl or di(C₁-C₃ alkoxy)-C₂-C₆alkyl; C₃-C₇ ketoalkyl; or C₅-C₇ cycloalkyl or keto-substituted C₅-C₇ cycloalkyl; or 4-hydroxycyclohexyl; or a pharmaceutically-acceptable salt thereof, are useful as 5HT₂ receptor antagonists.
式中的化合物
其中 R 是伯或仲 C₁-C₈ 烷基、C₂-C₄ 烯基-CH₂、C₃-C₈ 环烷基或 C₃-C₆ 环烷基取代的 C₁-C₅ 伯或仲烷基,R 中的碳原子总数不超过 8;R¹ 是烯丙基、H 或 C₁-C₄ 直链烷基,R² 是 C₁-C₃ 烷氧基-C₅-C₇ 环烷基;C₁-C₃烷氧基-C₂-C₆烷基或二(C₁-C₃烷氧基)-C₂-C₆烷基; C₃-C₇酮烷基;或 C₅-C₇环烷基或酮取代的 C₅-C₇环烷基;或
4-羟基环己基;或其药学上可接受的盐,可用作 5HT₂ 受体拮抗剂。