| The isolation and in vivo Potent Antitumor activity of clerodane diterpenoid from the oleoresin of the brazilian medicinal plant, copaifera langsdorfi desfon. A Ohsaki, LT Yan, S Ito, H Edatsugi, D Iwata, Y Komoda Bioorganic & Medicinal Chemistry Letters 4 (24), 2889-2892, 1994 | 135 | 1994 |
| Naucleamides A—E, New Monoterpene Indole Alkaloids from Nauclea latifolia H Shigemori, T Kagata, H Ishiyama, F Morah, A Ohsaki, J Kobayashi Chemical and Pharmaceutical Bulletin 51 (1), 58-61, 2003 | 121 | 2003 |
| Paratunamides A−D, Oxindole Alkaloids from Cinnamodendron axillare T Kagata, S Saito, H Shigemori, A Ohsaki, H Ishiyama, T Kubota, ... Journal of natural products 69 (10), 1517-1521, 2006 | 113 | 2006 |
| New constituents from the leaves of Morinda citrifolia J Takashima, Y Ikeda, K Komiyama, M Hayashi, A Kishida, A Ohsaki Chemical and pharmaceutical bulletin 55 (2), 343-345, 2007 | 105 | 2007 |
| Four New Triterpenoids from Maytenus ilicifolia A Ohsaki, Y Imai, M Naruse, S Ayabe, K Komiyama, J Takashima Journal of Natural Products 67 (3), 469-471, 2004 | 90 | 2004 |
| Subincanadines A−C, Novel Quaternary Indole Alkaloids from Aspidosperma subincanum J Kobayashi, M Sekiguchi, S Shimamoto, H Shigemori, H Ishiyama, ... The Journal of Organic Chemistry 67 (18), 6449-6455, 2002 | 90 | 2002 |
| Microanalysis of a selective potent anti-Helicobacter pylori compound in a Brazilian medicinal plant, Myroxylon peruiferum and the activity of analogues A Ohsaki, J Takashima, N Chiba, M Kawamura Bioorganic & Medicinal Chemistry Letters 9 (8), 1109-1112, 1999 | 78 | 1999 |
| Hypaphorine, an indole alkaloid from Erythrina velutina, induced sleep on normal mice M Ozawa, K Honda, I Nakai, A Kishida, A Ohsaki Bioorganic & Medicinal Chemistry Letters 18 (14), 3992-3994, 2008 | 72 | 2008 |
| The anti-Helicobacter pylori flavones in a Brazilian plant, Hyptis fasciculata, and the activity of methoxyflavones T Isobe, M Doe, Y Morimoto, K Nagata, A Ohsaki Biological and Pharmaceutical Bulletin 29 (5), 1039-1041, 2006 | 65 | 2006 |
| Brosimacutins A−I, Nine New Flavonoids from Brosimum acutifolium J Takashima, A Ohsaki Journal of natural products 65 (12), 1843-1847, 2002 | 62 | 2002 |
| Structures of new erythrinan alkaloids and nitric oxide production inhibitors from Erythrina crista-galli M Ozawa, S Kawamata, T Etoh, M Hayashi, K Komiyama, A Kishida, ... Chemical and Pharmaceutical Bulletin 58 (8), 1119-1122, 2010 | 61 | 2010 |
| Derrisin, a New Rotenoid from Derris malaccensis Plain and Anti-Helicobacter pylori Activity of Its Related Constituents J Takashima, N Chiba, K Yoneda, A Ohsaki Journal of natural products 65 (4), 611-613, 2002 | 55 | 2002 |
| Brartemicin, an Inhibitor of Tumor Cell Invasion from the Actinomycete Nonomuraea sp. Y Igarashi, T Mogi, S Yanase, S Miyanaga, T Fujita, H Sakurai, I Saiki, ... Journal of natural products 72 (5), 980-982, 2009 | 52 | 2009 |
| Antibacterial constituents against Helicobacter pylori of Brazilian medicinal plant, Pariparoba T Isobe, A Ohsaki, K Nagata Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan 122 (4), 291-294, 2002 | 52 | 2002 |
| Echinophyllins C−F, New Nitrogen-Containing Clerodane Diterpenoids from Echinodorus macrophyllus J Kobayashi, M Sekiguchi, S Shimamoto, H Shigemori, A Ohsaki Journal of natural products 63 (11), 1576-1579, 2000 | 51 | 2000 |
| Securinega Alkaloids from the Wood of Securinega suffruticosa var. amamiensis A Ohsaki, Y Kobayashi, K Yoneda, A Kishida, H Ishiyama Journal of natural products 70 (12), 2003-2005, 2007 | 46 | 2007 |
| Echinophyllins A and B, novel nitrogen-containing clerodane diterpenoids from Echinodorus macrophyllus J Kobayashi, M Sekiguchi, H Shigemori, A Ohsaki Tetrahedron Letters 41 (16), 2939-2943, 2000 | 44 | 2000 |
| TRAIL-enhancing activity of Erythrinan alkaloids from Erythrina velutina M Ozawa, T Etoh, M Hayashi, K Komiyama, A Kishida, A Ohsaki Bioorganic & Medicinal Chemistry Letters 19 (1), 234-236, 2009 | 43 | 2009 |
| Mururins AC, three new lignoids from Brosimum acutifolium and their protein kinase inhibitory activity J Takashima, S Asano, A Ohsaki Planta medica 68 (07), 621-625, 2002 | 43 | 2002 |
| Secu'amamine A, a novel indolizidine alkaloid from Securinega suffruticosa var. amamiensis A Ohsaki, H Ishiyama, K Yoneda, J Kobayashi Tetrahedron letters 44 (15), 3097-3099, 2003 | 42 | 2003 |
