2004年
- Saponins from the flower buds of Buddleja officinalis, Hongzhu Guo, Kazuo Koike, Wei Li, Tadaaki Satou, Dean Guo, and Tamotsu Nikaido, Journal of Natural Products, 67, 10-13 (2004).
- Maltol glucosides from the tuber of Smilax bockii, Hongzhu Guo, Kazuo Koike, Wei Li, Dean Guo and Tamotsu Nikaido, Phytochemistry, 65, 481-484 (2004).
- Complete 1H and 13C NMR assignments of two phytosterols from roots of Piper nigrum, Kun Wei, Wei Li, Kazuo Koike, Yuping Pei, Yingjie Chen and Tamotsu Nikaido, Magnetic Resonance in Chemistry, 42, 355-359 (2004).
- New α-tetralonyl glucosides from the fruits of Juglands mandshurica, Lijuan Liu, Wei Li, Kazuo Koike, Shujie Zhang and Tamotsu Nikaido, Chemical & Pharmaceutical Bulletin, 52, 562-569 (2004).
- New lignan glucosides from the stems of Tinospora sinensis, Wei Li, Kazuo Koike, Lijuan Liu, Lianbo Lin, Xiaowen Fu, Yingjie Chen and Tamotsu Nikaido, Chemical & Pharmaceutical Bulltin, 52, 638-640 (2004).
- New amide alkaloids from the roots of Piper nigrum, Kun Wei, Wei Li, Kazuo Koike, Yuping Pei, Yingjie Chen and Tamotsu Nikaido, Journal of Natural Products, 67, 1005-1009 (2004).
- Two new galloylglucosides from the leaves of Mallotus furetianus, Kun Wei, Wei Li, Kazuo Koike, Lijuan Liu, Xiaowen Fu, Lianbo Lin, Yingjie Chen and Tamotsu Nikaido, Chemical & Pharmaceutical Bulltin, 52, 776-779 (2004).
- Two new naphthalenylglucosides and a new phenyl butyric acid glucoside from the fruit of Juglands mandshurica, Lijuan Liu, Wei Li, Kazuo Koike and Tamotsu Nikaido Heterocycles, 63, 1429-1436 (2004).
- A new prenylated flavone from the leaves of Glycyrrhiza uralensis cultivated in China, Hong bai, Wei Li, Kazuo Koike, Yuping Pei, Deqiang Dou, Yingjie Chen, Yinghua Wang and Tamotsu Nikaido, Heterocycles, 63, 2091-2095 (2004).
- Studies on the cytotoxicity of compounds from fruits of Juglans mandshurica, Lijuan Liu, Tadaaki Satou, Kazuo Koike, Wei Li and Tamotsu Nikaido, Natural Medicines, 58, 226-229 (2004).

