Method for inhibiting melanin production and whitening skin with pyrimidylpyrazole compounds or pharmaceutically acceptable salts thereof
US8324234B2 · kind B2 · utility
1Cited by
1References
2Claims
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Key dates
| Filing date | Feb 6, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Apr 13, 2029 |
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 compound represented by formula (1) or a pharmacologically acceptable salt thereof:wherein, R1, R3, R4, and R6 are each independently C1-3 alkyl; and R2 and R5 are each independently a hydrogen atom or C1-3 alkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.