New Sesquiterpene Lactones from Glechoma hederacea L. and Their Cytotoxic Effects on Human Cancer Cell Lines - Kim, JinPyo; Lee, IkSoo; Ha, DoThi; Seo, JeongJu; Min, ByungSun; Yoo, IckDong; Bae, KiHwan (Planta Medica, 2011)