EXTRACT OF GREYIA RADLKOFERI AND USE THEREOF

摘要

This invention relates to the isolation, and use of a plant extract in the treatment of skin hyper-pigmentation. More particularly, this invention relates to the isolation of a tyrosinase inhibitor in an extract of plant matehal from the Greyia radlkoferi (G. radlkoferi) plant, the extract including 5,7-dihidroxyflavone[(2S)-pinocembrin]; 2', 6'-dihydroxy-4'-methoxydihydrochalcone; 2',4',6'-trihydroxyhydrochalcone; 3,5,7-trihydroxyflavone and 4',5'7-thhydroxyisoflavone.