QUINOLINE COMPOUND

摘要

A compound represented by the formula (I) [wherein Ar represents an optionally substituted cyclic group; X represents a bond or a spacer having a C1−6 main chain; R1 and R2 are the same or different and each represents hydrogen or an optionally substituted hydrocarbon group or R1 and R2 may form an optionally substituted nitrogenous heterocycle in cooperation with the adjacent nitrogen atom; Y represents an optionally substituted divalent hydrocarbon group (excluding CO); R3 represents hydrogen or an optionally substituted hydrocarbon group; and ring A and ring B each may have other substituent(s), and when ring B has another substituent, then this substituent may be bonded to R1 to form a ring]; a salt of the compound; or a prodrug of any of these. They have antagonistic activity against a melanin−concentrating hormone and hence are useful as an obesity preventive/remedy, etc.