The present invention provides a compound represented by the formula
wherein R1 is a hydrocarbon group optionally having substituent(s), amino optionally having substituent(s), hydroxy optionally having a substituent or a heterocyclic group optionally having substituent(s); R2 is a hydrogen atom or a hydrocarbon group optionally having substituent(s); Xa and Xb are each C, N, O or S; Xc and Xd are each C or N; m is 0-2; n is 1-3; ring A is a 5-membered ring optionally having substituent(s); ring B is a 6-membered ring optionally having substituent(s); and ring C is a 3- to 5-membered ring optionally having substituent(s), provided that when Xa, Xc and Xd are each C, then Xb is N or S, or a salt thereof, which is useful as an agent for the prophylaxis or treatment of a disease relating to an action of melatonin, and the like.
本发明提供了一种由式表示的化合物
其中 R1 是任选具有取代基的烃基、任选具有取代基的
氨基、任选具有取代基的羟基或任选具有取代基的杂环基团;R2 是氢原子或任选具有取代基的烃基;Xa 和 Xb 各为 C、N、O 或 S;Xc 和 Xd 各为 C 或 N;m 为 0-2;n 为 1-3;环 A 是可选具有取代基的 5 元环;环 B 是可选具有取代基的 6 元环;环 C 是可选具有取代基的 3 至 5 元环,条件是当 Xa、Xc 和 Xd 各为 C 时,则 Xb 为 N 或 S,或其盐,可用作预防或治疗与
褪黑激素作用有关的疾病的制剂等。