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: <i>ent</i>-Rosane-Type Diterpenoids from the Madagascar Endemic Plant, <i>Omphalea oppositifolia</i>. Chemical and Pharmaceutical Bulletin. 2022. 70. 12. 901-906
Susumu Kawakami, Masanori Inagaki, Motohiro Nishimura, Hideaki Otsuka, Katsuyoshi Matsunami, Tatsuo Nehira, Takakazu Shinzato. Crotofolane-Type Diterpenoids: Crotocascarins R-V, Rearranged Trinorcrotofolane: Crotocascarin δ and a Phorbol Derivative from the Leaves of <i>Croton cascarilloides</i>. Chemical and Pharmaceutical Bulletin. 2022. 70. 4. 286-292
Susumu Kawakami, Misaki Ishinaka, Shintaro Asaumi, Sachiko Sugimoto, Masanori Inagaki, Motohiro Nishimura, Katsuyoshi Matsunami, Hideaki Otsuka, Takakazu Shinzato, Tadashi Hyodo, et al. Ardisiatetrons A and B: tetronic acid derivatives and triterpenes from the leaves of Ardisia quinquegona and their biological activity. Journal of Natural Medicines. 2021. 75. 3. 643-654
Susumu Kawakami, Erika Miura, Ayaka Nobe, Masanori Inagaki, Motohiro Nishimura, Katsuyoshi Matsunami, Hideaki Otsuka, Mitsunori Aramoto. Ebenamariosides A-D: Triterpene glucosides and megastigmanes from the leaves of diospyros maritima. Chemical and Pharmaceutical Bulletin. 2019. 67. 12. 1337-1346
Susumu Kawakami, Masanori Inagaki, Katsuyoshi Matsunami, Hideaki Otsuka, Masatoshi Kawahata, Kentaro Yamaguchi. Crotofolane-Type Diterpenoids, Crotocascarins L-Q, and a Rearranged Crotofolane-Type Diterpenoid, Neocrotocascarin, from the Stems of Croton cascarilloides. CHEMICAL & PHARMACEUTICAL BULLETIN. 2016. 64. 10. 1492-1498