Literature DB >> 7480203

Potent inhibitors of tyrosinase activity and melanin biosynthesis from Rheum officinale.

K Iida1, K Hase, K Shimomura, S Sudo, S Kadota, T Namba.   

Abstract

Thirty-three crude drug extracts were screened for their tyrosinase inhibitory activity. Among them, the acetone extract of the rhizomes of Rheum officinale Baillon showed the strongest inhibitory activity. Tyrosinase inhibitory activity-guided fractionation and chemical analysis led to the isolation of two potent compounds, 3,4',5-trihydroxystilbene-4'-O-beta-D-(2"-O-galloyl)glucopyr anoside (1) and 3,4',5-trihydroxystilbene-4'-O-beta-D-(6"-O-galloyl)glucopyr anoside (2). These compounds showed a competitive inhibition against tyrosinase and also inhibited the melanin biosynthesis.

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Year:  1995        PMID： 7480203     DOI： 10.1055/s-2006-958129

Source DB:  PubMed          Journal:  Planta Med        ISSN： 0032-0943            Impact factor:   3.352


  14 in total

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