| abstract |
Provided are a ring-fused heterocyclic derivative represented by general formula (I), which has an effect of regulating T-type calcium channel and is useful as a therapeutic and/or prophylactic agent for pruritus, or a pharmaceutically acceptable salt thereof, and so on. In general formula (I): R1 represents optionally substituted lower alkyl, etc.; R2 represents optionally substituted cycloalkyl, etc.; Q represents a hydrogen atom, etc.; R3 represents -C(=O)NR8R9 [wherein R8 and R9 are the same or different and represent a hydrogen atom, etc.], etc.; L1 represents -CR11AR11B- [wherein R11A and R11B are the same or different and represent a hydrogen atom, etc.], etc.; and W1 and W2 are the same or different and represent C-R12 [wherein R12 represents a hydrogen atom, etc.], etc. |