Abstract
Two new flavonol glycosides, kaempferol 3-O-[β-D-glucopyranosyl-(1→4)][α-L-rhamnopyranosyl-(1→6)]-β-D-glucopyranoside and quercetin 3-O-[β-D-glucopyranosyl-(1→4)][α-L-rhamnopyranosyl-(1→6)]-β-D-glucopyranoside, together with three known flavonoids were isolated using column chromatography from the aerial parts of Lamium amplexicaule (Labiatae). In addition, the five isolates were evaluated for their in vitro free radical scavenging (EC50 values, 14.1 – 63.9 μg/mL) and tyrosinase inhibitory activities (IC50 values, 110.4 – 193.5 μg/mL).
Key words
Lamium amplexicaule
- Labiatae - flavonol glycosides - free radical scavenging - tyrosinase inhibitors
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Prof. Hee-Juhn Park, Ph.D
Department of Pharmaceutical Engineering
Sangji University
Wonju 220–702
Korea
Telefon: +82-33-730-0564
Fax: +82-33-730-0564
eMail: hjpark@sangji.ac.kr
