| abstract |
Provided is a compound of a formula (I): n n n n n n n n n n [wherein R 1a and R 1b are the same or different, representing a hydrogen atom, etc.; R 2a and R 2b are the same or different, representing a hydrogen atom, etc., or R 2a and R 2b , taken together, form —CH 2 CH 2 —, R 3a and R 3b are the same or different, representing a hydrogen atom, etc.; or R 3a and R 3b , taken together, form —CH 2 CH 2 -etc.; Y 1 and Y 2 represent —C(R) 2 —, etc.; Z represents OR, NR 2 , etc.; R represents a hydrogen atom, a C 1-6 alkyl group, etc.; Ar 1 represents a 6-membered aromatic carbocyclic group, etc.; Ar 2 represents a 6-membered aromatic carbocyclic group, etc; A 3 represents a 6-membered aromatic carbocyclic group etc.]. The compound is useful as a medicine for central disorders, cardiovascular disorders, metabolic disorders. |