2018 - 2021 Search for medicinal natural products from Malagasy endemic plants
2015 - 2018 Bioactive compounds from plants collected in Okinawa and subtropical areas, and their genetic engineering application
Papers (41)：
Zhichao Wang, Yoshi Yamano, Susumu Kawakami, Gadah Abdulaziz Al-Hamoud, Sachiko Sugimoto, Hideaki Otsuka, Katsuyoshi Matsunami. New ψ-Santonin Derivatives from Crossostephium chinense and Their Anti-Proliferative Activities against Leishmania major and Human Cancer Cells A549. Molecules. 2023. 28. 24. 8108-8108
Minh Giang Phan, Ngoc Phuc Dong, Thi Viet Huong Do, Minh Trang Vu, Phuong Linh To, Nghia Vu Nguyen, Thi Thu Thuy Tran, Susumu Kawakami, Hideaki Otsuka. A new cadinane sesquiterpenoid from Eupatorium adenophorum and α-glycosidase and AChE inhibitory activities of a gossypetin acylglucoside. Medicinal Chemistry Research. 2023. 32. 2168-2175
Zhichao Wang, Ben-Yeddy Abel Chitama, Keisuke Suganuma, Yoshi Yamano, Sachiko Sugimoto, Susumu Kawakami, Osamu Kaneko, Hideaki Otsuka, Katsuyoshi Matsunami. Two New Cytotoxic Sesquiterpene-Amino Acid Conjugates and a Coumarin-Glucoside from Crossostephium chinense. Molecules. 2023. 28. 12. 4696-4696
Susumu Kawakami, Hideaki Otsuka. Crotofolanes, Rearranged Crotofolanes, and a Novel Diterpene: Isocrotofolane from Croton cascarilloides, Collected in Okinawa. Journal of Natural Medicines. 2023. 77. 3. 421-429
Susumu Kawakami, Chieko Kanagawa, Liva Harinantenaina Rakotondraibe, Masanori Inagaki, Motohiro Nishimura, Hideaki Otsuka, Toshio Seyama, Katsuyoshi Matsunami, Falitiana Marrino Rakotoarisoa, Stéphan Richard Rakotonandrasana, et al. Omphalines A-E: ent-Rosane-Type Diterpenoids from the Madagascar Endemic Plant, Omphalea oppositifolia. Chemical and Pharmaceutical Bulletin. 2022. 70. 12. 901-906
