The present invention provides a compound represented by the formula
wherein R
1
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); R
2
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.
本发明提供了一种化合物,其表示式为其中R1是一个烃基,可选地具有取代基,
氨基,可选地具有取代基的羟基或杂环基;R2是氢原子或烃基,可选地具有取代基;Xa和Xb分别为C,N,O或S;Xc和Xd分别为C或N;m为0-2;n为1-3;环A是一个五元环,可选地具有取代基;环B是一个六元环,可选地具有取代基;环C是一个3-至5元环,可选地具有取代基,前提是当Xa,Xc和Xd均为C时,那么Xb为N或S,或其盐,用作预防或治疗与
褪黑素作用相关的疾病的药剂等。