| abstract |
(57) [Problem] To provide an excellent lipid peroxide production inhibitor. SOLUTION: The formula: [Wherein, ring A is a non-aromatic 5- to 7-membered nitrogen-containing heterocyclic ring which may further have a substituent, ring B is a benzene ring which may further have a substituent, and ring C is Further, R represents a hydrogen atom or an acyl group in a dihydrofuran ring which may have a substituent. Provided that the ring A has the formula-(CH 2 ) m -N (R ")- C (＝ O) —R ′ (wherein, R ′ is a hydrocarbon group which may have a substituent, an amino group which may have a substituent, or a heterocyclic group which may have a substituent. When the ring group is a non-aromatic 5-membered nitrogen-containing heterocycle substituted with a group represented by R ″ represents a hydrogen atom or a hydrocarbon group which may have a substituent, ring B is substituted When the ring A is a non-aromatic 6-membered nitrogen-containing heterocyclic ring substituted with oxo, The ring indicates a fully substituted benzene ring. Or a salt thereof. |