Inhibition of Protein Tyrosine Phosphatase 1B by Prenylated Isoflavonoids Isolated from the Stem Bark of Erythrina addisoniae - Bae, Eun Young; Na, MinKyun; Njamen, Dieudonné; Mbafor, Joseph Tanyi; Fomum, Zacharias Tanee; Cui, Long; Choung, Dong Ho; Kim, Bo Yeon; Oh, Won Keun; Ahn, Jong Seog (Planta Medica, 2006)