In vitro: |
Korean Journal of Microbiology & Biotechnology, 2003 , 47 (12) :3829-36. | Melanin biosynthesis inhibitory activities of coumarins isolated from Angelica polymorpha MAXIM[Reference: WebLink] | METHODS AND RESULTS: During the screening for inhibitors of melanin biosynthesis from plant extract, Angelica polymorpha MAXIM which showed a high lecel of inhibition was selected. The inhibiting substances were purified form methanol extract of Angelica Polymorpha MAXIM followed by silica gel column chromatography and HPLC. The inhibitors were identified as heraclenin, Isosaxalin and heraclenol 3'-Me ether , by spectroscopic methods of ESI-MS, ©öH-NMR,©ö©øC-NMR, DEPT, HMQC and HMBC.
CONCLUSIONS:
These compounds did not have mushroom tyrosinase inhibitory activity, but showed a highly potent melanin biosynthesis inhibition zone in the plate culture of Streptomyces bikiniensis, a bacterium used as an indicator organism in this work. These compounds did not show any growth inhibition against S. bikiniensis at the same concentration of melanin biosynthesis test |
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