Toshio Niwa, Yoji Kato, Toshihiko Osawa. Chemical and in vitro biological formation of octahydrocurcumin stereoisomers, and in vitro activity of raceme and meso-octahydrocurcumin. Bioscience, Biotechnology, and Biochemistry. 2023. 87. 3. 303-307
Toshio Niwa, Shin-ichiro Yokoyama, Mika Mochizuki, Toshihiko Osawa. In Vitro Production of Optically Active Octahydrocurcumin by Human Intestinal Bacterium. Biological and Pharmaceutical Bulletin. 2022. 45. 3. 378-381
Toshio Niwa, Shin-ichiro Yokoyama, Mika Mochizuki, Toshihiko Osawa. Production of Optically Active Hexahydrocurcumin by Human Intestinal Bacterium in Vitro. Biological and Pharmaceutical Bulletin. 2021. 44. 1. 136-139