Two New Flavonol Glycosides from Lamium amplexicaule L. and Their in vitro Free Radical Scavenging and Tyrosinase Inhibitory Activities - Nugroho, Agung; Choi, Jun-Kil; Park, Jong-Hee; Lee, Kyung-Tae; Cha, Bae Cheon; Park, Hee-Juhn (Planta Medica, 2009)