Takaaki Yasuda, Mai Fukui, Takahiro Nakazawa, Ayumi Hoshikawa, Keisuke Ohsawa. Metabolic fate of fraxin administered orally to rats. JOURNAL OF NATURAL PRODUCTS. 2006. 69. 5. 755-757
Takaaki Yasuda, Miwa Endo, Toshiyuki Kon-no, Tomoko Kato, Mariko Mitsuzuka, Keisuke Ohsawa. Antipyretic, analgesic and muscle relaxant activities of pueraria isoflavonoids and their metabolites from Pueraria lobata Ohwi - A traditional chinese drug. Biological and Pharmaceutical Bulletin. 2005. 28. 7. 1224-1228
T Yasuda, K Ohsawa. Urinary and biliary metabolites of daidzin,daidzein and puerarin in rats. TOWARDS NATURAL MEDICINE RESEARCH IN THE 21ST CENTURY. 1998. 1157. 273-283
T Yasuda, S Mizunuma, Y Kano, K Saito, K Ohsawa. Urinary and biliary metabolites of genistein in rats. BIOLOGICAL & PHARMACEUTICAL BULLETIN. 1996. 19. 3. 413-417