| abstract |
(57) [Problem] To provide a dimethylpropanediol derivative having particularly excellent action and safety as an active ingredient of a hair restorer. SOLUTION: The general formula: [Wherein R 1 and R 2 are each independently a substituted or unsubstituted C 1-30 hydrocarbon group or a heteroatom containing 1 to 4 hetero atoms selected from oxygen, sulfur and nitrogen atoms. Or a 6-membered heterocyclic group, and R 3 represents a hydrogen atom, an optionally substituted alkyl group, an acyl group, an alkoxycarbonyl group, a phenoxycarbonyl group or an optionally substituted carbamoyl group, a and b Each independently represents 0 or 1.] or a salt thereof. |