FUSED HETEROCYCLIC RING DERIVATIVE AND USE THEREOF

摘要

Disclosed are: a fused heterocyclic ring derivative having a potent Smo-inhibiting activity: and use of the fused heterocyclic ring derivative. Specifically disclosed are: a compound represented by formula (CI) [wherein each symbol is as defined in the description] or a salt thereof; and a medicinal agent comprising the compound or a prodrug thereof, which can be used as a Smo inhibitor or a prophylactic or therapeutic agent for cancer.