Hair revitalizing agent

Claim 1

A hair revitalizing agent containing a compound represented by the formula shown below, or a pharmaceutically acceptable salt thereof: (wherein each adjoining pair of R¹ and R², R³ and R⁴, R⁵ and R⁶ independently, a) represents two adjoining hydrogen atoms, or b) forms another bond with a carbon atom to which it is bonded, and in addition thereto, R² may be an alkyl group; R⁷ represents a hydrogen atom, a hydroxy group, a protected hydroxy group, or an alkyloxy group, or represents an oxo group together with R¹; R⁸ and R⁹ independently represent a hydrogen atom, or a hydroxy group; R¹⁰ represents a hydrogen atom, an alkyl group, an alkyl group substituted with 1 or more hydroxy groups, an alkenyl group, an alkenyl group substituted with 1 or more hydroxy groups, or an alkyl group substituted with an oxo group; X represents an oxo group, (hydrogen atom, hydroxy group), (hydrogen atom, hydrogen atom) or a group represented by -CH₂O-; Y represents an oxo group, (hydrogen atom, hydroxy group), (hydrogen atom, hydrogen atom), or a group represented by the formula N-NR¹¹R¹² or N-OR¹³; R¹¹ and R¹² independently represent a hydrogen atom, an alkyl group, an aryl group or a tosyl group; R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²² and R²³ independently represent a hydrogen atom or an alkyl group; R²⁰ and R²¹ independently represent an oxo group, or may be each independently (R 20 a , hydrogen atom) and (R 21 a , hydrogen atom); R 20 a and R21 a indepen­dently represent a hydroxy group, an alkyloxy group or a group represented by the formula OCH₂OCH₂CH₂OCH₃ , or R 21 a represents a protected hydroxy group, and further, R 20 a and R 21 a taken together form an oxygen atom in an epoxy ring; n represents 1, 2 or 3, and in addition to the above meanings, Y, R¹⁰, and R²³ together with the carbon atoms to which they are bonded may represent a heterocyclic group containing nitrogen atom, sulfur atom or oxygen atom comprising a saturated or unsaturated 5- or 6-membered ring, and the heterocyclic group may be substituted with 1 or more group selected from alkyl groups, hydroxy group, alkyl groups substituted with 1 or more hydroxy group, alkyloxy groups, benzyl group and the group represented by -CH₂Se(C₆H₅).