Method for skin whitening
US8211412B2 · kind B2 · utility
1Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2012 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Feb 7, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides a compound having an excellent inhibitory action on melanin production and being useful as a whitening agent, and a skin external preparation containing the compound. The whitening agent of the present invention comprises, as an active ingredient, a heterocyclic compound represented by formula (1) or a pharmacologically acceptable salt thereof:wherein R1, R2, and R2′ are each independently C1-3 alkyl; Y is S or O; and p is an integer of 0 to 3, wherein when p is 2 or 3, R1 may be the same or different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.