| 摘要 |
Provided is a compound of a formula (I): [wherein R1a and R1b are the same or different, representing a hydrogen atom, etc.; R2a and R2b are the same or different, representing a hydrogen atom, etc., or R2a and R2b, taken together, form -CH2CH2-, R3a and R3b are the same or different, representing a hydrogen atom, etc.; or R3a and R3b, taken together, form -CH2CH2-etc.; Y1 and Y2 represent -C(R)2-, etc.; Z represents OR, NR2, etc.; R represents a hydrogen atom, a C1-6 alkyl group, etc.; Ar1 represents a 6-membered aromatic carbocyclic group, etc.; Ar2 represents a 6-membered aromatic carbocyclic group, etc; A3 represents a 6-membered aromatic carbocyclic group etc.]. The compound is useful as a medicine for central disorders, cardiovascular disorders, metabolic disorders.
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