Bioactive compounds from the leavers of  Eugenia uniflora

Mamdouh Samy Nabil, Sachiko Sugimoto, Katsuyoshi Matsunami and Mohamed Salah Kamel: Journal of Natural Products (INDIA), 7(00) 37-47 (2014)

Grevillosides J-Q, Arbutin derivatives from the leaves of Grevillea robusta and their melanogenesis inhibitory activity

Yukiko Yamashita-Higuchi, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Takahito Nakai: Chemical and Pharmaceutical Bulletin, 64(04), 364-372 (2014)

3,4-seco-24-homo-28-nor-Cycloartane and drimane-type sesquiterpenes and their lactams from the EtOAc-soluble fraction of a leaf extract of Cinnamosma fragrans and their biological activity

Yuya Nomoto, Liva Harinantenaina, Sachiko Sugimoto, Katsuyoshi Matsunami and Hideaki Otsuka: Journal of Natural Medicines, 68(03) 513-521 (2014)

Cembrene-type diterpenoids and a phenolic compound from the leaves of Thai medicinal plant, Croton sublyratus Kurz

Yasue Oka, Susumu Kawakami, Sachiko Sagimoto, Katsuyoshi Matsunami, Hideaki Otsuka, Duangporn Lhieochaiphant and Sorasak Lhieochaiphant: American Journal of Plant Sciences, 5(09), 1370-1377 (2014)

Guaianolides from Curcuma kwangsiensis

Phan Minh Giang, Tran Thi Thanh Nhan, Truong Thi To Chinh, Katsuyoshi Matsunami, Hideaki Otsuka and Phan Tong Son: Phytochemistry Letters, 9(09), 137-140 (2014)

One new flavonoid xyloside and one new natural triterpene rhamnoside from the leaves of Syzygium grande

Mamdouh Samy Nabil, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Mohamed Salah Kamel: Phytochemistry Letters, 9(12), 86-90 (2014)

Mamdouh Samy Nabil, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Mohamed Salah Kamel: Chemical and Pharmaceutical Bulletin, 64(10), 1013-1018 (2014)

Sachiko Sugimoto, Amira Samir Wanas, Tsutomu Mizuno, Katsuyoshi Matsunami, Mohamed Salah Kamel and Hideaki Otsuka: Phytochemistry, 108(11), 189-195 (2014)

Nitrile-containing phenolic glucosides from the leaves of Glochidion acuminatum

Yukiko Yamashita-Higuchi, Sachiko Sugimoto, Katsuyoshi Matsunami, Masanori Inagaki, Hideaki Otsuka and Yoshio Takeda: Chemical and Pharmaceutical Bulletin, 65(01), 49-53 (2015)

Shinji Takahashi, Susumu Kawakami, Sachiko Sugimoto, Katsuyoshi Matsunami and Hideaki Otsuka: American Journal of Plant Sciences 06(05) 676‒684 (2015)

Biological studies on chemical constituents of Ruellia patula and Ruellia tuberosa

Mamdouh Nabil Samy, Hany Ezzat Khalil, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Mohamed Sakah Kamel: Journal of Pharmacognosy and Phytochemistry 04(01) 64-67 (2015)

Yuka Uemura, Mio Iwami, Susumu Kawakami, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka, Masatoshi Kawahata and Kentaro Yamaguchi: Chemical and Pharmaceutical Bulletin, 65(08), 608-616 (2015)

New cis-ent-clerodanes from Linaria japonica

Retno Widyowati, Sachiko Sugimoto, Yoshi Yamano, Skardiman Harjotaruno, Hideaki Otsuka and Katsuyoshi Matsunami: Phytochemistry Letters 14(00) 56‒62 (2015)

Susumu Kawakami, Masanori Inagaki, Katsuyoshi Matsunami, Hideaki Otsuka, Yoshio Takeda, Masatoshi Kawahata and Kentaro Yamaguchi:: Chemical and Pharmaceutical Bulletin 63(12) 1047-1054 (2015)

Mio Iwami, Susumu Kawakami, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka, Tsutomu Mizuta and Takakazu Shinzato: Research & Reviews: Journal of Pharmacognosy and Phytochemistry 03(04) 11-15 (2015)

Mamdouh Samy Nabil, Ashraf Nageeb El-Sayed hamed, Sachiko Sugimoto, Hideaki Otsuka Mohamed, Salah Kamel and Katsuyoshi Matsunami: Natural Product Research, 30(08), 967-973 (2016)

Ahmed Gomaa Gomaa Darwish, Mamdouh Nabil Samy, Sachiko Sugimoto,
Hideaki Otsuka, Hosni Abdel-Salam and Katsuyoshi Matsunami: Chemical and Pharmaceutical Bulletin 64(04) 360-365 (2016)

Bioactive compounds from the leaves of Lumnitzera racemosa against acetaminophen-induced liver damage in vitro

Ahmed Gomaa Gomaa Darwish, Mamdouh Nabil Samy, Sachiko Sugimoto, Hideaki Otsuka, Hosni Abdel-Salam, Mohammady Ibrahim Issa, Emad Abry Sabry and Katsuyoshi Matsunami: Journal of Arid Land Studies 26(3) 183-186 (2016)

Retno Widyowati, Sachiko Sugimoto, Yoshi Yamano, Skardiman Harjotaruno, Hideaki Otsuka and Katsuyoshi Matsunami: Chemical and Pharmaceutical Bulletin 64(05) 517-521 (2016)

Yuka Uemura, Susumu Kawakami, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Takakazu Shinzato: Chemical and Pharmaceutical Bulletin 64(06) 638-643 (2016)

Dianthosaponins G‒I, triterpene saponins, an anthranilic acid amide glucoside and a flavonoid glycoside from the aerial parts of Dianthus japonicus and their cytotoxicity

Yuka Kanehira, Susumu Kawakami, Sachiko Sugimoto, Katsuyoshi Matsunami and Hideaki Otsuka: Journal of Natural Medicine 70(04) 816-824 (2016)

Crotofolane-type diterpenoids, crotocascarins L–Q, and a rearranged crotofolane-type diterpenoid, neocrotocascarin, from the stems of Croton cascarilloides

Susumu Kawakami, Masanori Inagaki, Katsuyoshi Matsunami, Hideaki Otsuka, Masatoshi Kawahata and Kentaro Yamaguchi^: Chemical and Pharmaceutical Bulletin 64(10) 1492-1498 (2016)

Haruka Katsui, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka and Sorasak Lhieichaiphant: Chemical and Pharmaceutical Bulletin 65(01) 97-101 (2017)

Chodatiionosides A and B, two new megastigmane glycosides from Chorisia chodatii leaves

Mamdouh Nabil Samy, John Refaat Fahim, Sachiko Sugimoto, Hideaki Otsuka, Katsuyoshi Matsunami and Mohamed Salah Kamel: Journal of Natural Medicines 71(01) 321-328 (2017)