Masayoshi Okano

1.2k total citations
62 papers, 962 citations indexed

About

Masayoshi Okano is a scholar working on Molecular Biology, Organic Chemistry and Pharmacology. According to data from OpenAlex, Masayoshi Okano has authored 62 papers receiving a total of 962 indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Molecular Biology, 18 papers in Organic Chemistry and 13 papers in Pharmacology. Recurrent topics in Masayoshi Okano's work include Phytochemical compounds biological activities (34 papers), Multicomponent Synthesis of Heterocycles (11 papers) and Synthesis of Organic Compounds (10 papers). Masayoshi Okano is often cited by papers focused on Phytochemical compounds biological activities (34 papers), Multicomponent Synthesis of Heterocycles (11 papers) and Synthesis of Organic Compounds (10 papers). Masayoshi Okano collaborates with scholars based in Japan, United States and India. Masayoshi Okano's co-authors include Narihiko Fukamiya, Kiyoshi Tagahara, Kuo‐Hsiung Lee, Takaaki Aratani, Iris H. Hall, Kuo-Hsiung Lee, Kuo-Hsiung Lee, Harukuni Tokuda, Motoharu Ju‐ichi and Nanao Hayashi and has published in prestigious journals such as The Journal of Organic Chemistry, Phytochemistry and Journal of Pharmaceutical Sciences.

In The Last Decade

Masayoshi Okano

61 papers receiving 906 citations

Peers

Masayoshi Okano

PHARM

BIOCH

Narihiko Fukamiya Japan

Albert T. Sneden United States

Takahiko Tsuyuki Japan

Yi-Chen Chia Taiwan

Yu-Hsuan Lan Taiwan

R.M. Wiedhopf United States

Jack R. Cole United States

Sterling J. Torrance United States

Peggy J. Brodie United States

Hiroshi Araya Japan

Narihiko Fukamiya Japan

Masayoshi Okano

791 ×1.1

255 ×1.0

208 ×1.1

138 ×0.8

PHARM

188 ×1.3

BIOCH

Citations per year, relative to Masayoshi Okano Masayoshi Okano (= 1×) peers Narihiko Fukamiya

Countries citing papers authored by Masayoshi Okano

Since Specialization

Citations

This map shows the geographic impact of Masayoshi Okano's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Masayoshi Okano with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Masayoshi Okano more than expected).

Fields of papers citing papers by Masayoshi Okano

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Masayoshi Okano. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Masayoshi Okano. The network helps show where Masayoshi Okano may publish in the future.

Co-authorship network of co-authors of Masayoshi Okano

This figure shows the co-authorship network connecting the top 25 collaborators of Masayoshi Okano. A scholar is included among the top collaborators of Masayoshi Okano based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Masayoshi Okano. Masayoshi Okano is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Fukamiya, Narihiko, et al.. (2006). A new quassinoid, ailantinol H from Ailanthus altissima . Natural Product Research. 20(12). 1105–1109. 7 indexed citations

Shinozaki, Youichi, Narihiko Fukamiya, Masayoshi Okano, et al.. (2002). Multidrug Resistant Cancer Cells Susceptibility to Cytotoxic Taxane Diterpenes from Taxus yunnanensis and Taxus chinensis. Bioorganic & Medicinal Chemistry Letters. 12(19). 2785–2788. 12 indexed citations

Fukamiya, Narihiko, Masayoshi Okano, Harukuni Tokuda, et al.. (2002). Cancer chemopreventive effect of quassinoid derivatives. Introduction of side chain to shinjulactone C for enhancement of inhibitory effect on Epstein–Barr virus activation. Cancer Letters. 185(1). 47–51. 13 indexed citations

Fukamiya, Narihiko, Xiaoyang Mou, Teruo Mukainaka, et al.. (2000). Conversion of Quassinoids for Enhancement of Inhibitory Effect against Epstein-Barr Virus Early Antigen Activation. Introduction of Lipophilic Side Chain and Esterification of Diosphenol.. Chemical and Pharmaceutical Bulletin. 48(6). 876–878. 9 indexed citations

Fukushima, Masao, Narihiko Fukamiya, Masayoshi Okano, et al.. (1998). A New Taxoid, 19-Acetoxytaxagifine, from Taxus chinensis. Journal of Natural Products. 62(1). 140–142. 10 indexed citations

Fukamiya, Narihiko, et al.. (1997). Anti-tuberculosis Activity of Quassinoids.. Chemical and Pharmaceutical Bulletin. 45(9). 1527–1529. 44 indexed citations

Kubota, Kengo, Narihiko Fukamiya, Harukuni Tokuda, et al.. (1997). Quassinoids as inhibitors of Epstein-Barr virus early antigen activation. Cancer Letters. 113(1-2). 165–168. 22 indexed citations

Ohno, Nobuhiro, Narihiko Fukamiya, Masayoshi Okano, Kiyoshi Tagahara, & Kuo-Hsiung Lee. (1997). Synthesis of cytotoxic fluorinated quassinoids. Bioorganic & Medicinal Chemistry. 5(8). 1489–1495. 17 indexed citations

Fukamiya, Narihiko, Nobuhiro Ohno, Harukuni Tokuda, et al.. (1997). Inhibitory Effects of Quassinoid Derivatives on Epstein-Barr Virus Early Antigen Activation.. Chemical and Pharmaceutical Bulletin. 45(4). 675–677. 12 indexed citations

10.

Fukamiya, Narihiko, et al.. (1995). Bruceosides D, E, and F, Three New Cytotoxic Quassinoid Glucosides from Brucea javanica. Journal of Natural Products. 58(7). 1032–1038. 31 indexed citations

11.

Takemura, Yuko, Motoharu Ju‐ichi, Masayoshi Okano, et al.. (1994). Constituents of Domestic Citrus Plants. Part XVII. Three New Bicoumarins from Citrus hassakul.. Chemical and Pharmaceutical Bulletin. 42(6). 1213–1215. 7 indexed citations

12.

Fukamiya, Narihiko, et al.. (1993). Antifeedant and Insecticidal Activity of Quassinoids against Diamondback Moth (Plutella xylostella). Bioscience Biotechnology and Biochemistry. 57(2). 244–246. 14 indexed citations

13.

Fukamiya, Narihiko, Masayoshi Okano, Kiyoshi Tagahara, Takaaki Aratani, & Kuo-Hsiung Lee. (1988). Antitumor Agents, 93. Bruceanol C, a New Cytotoxic Quassinoid from Brucea antidysenterica. Journal of Natural Products. 51(2). 349–352. 14 indexed citations

14.

Okano, Masayoshi, Narihiko Fukamiya, Tomoyuki Fujita, Hiroshi Matsumoto, & Takaaki Aratani. (1985). Constituents in marine algae. VII. Nonpolar constituents of Hizikia fusiformis (HARVEY) OKAMURA.. NIPPON SUISAN GAKKAISHI. 51(8). 1305–1310. 6 indexed citations

15.

Lee, Kuo-Hsiung, Nanao Hayashi, Masayoshi Okano, Hirōshi Nozaki, & Motoharu Ju‐ichi. (1984). Antitumor Agents, 65. Brusatol and Cleomiscosin-A, Antileukemic Principles from Brucea javanica. Journal of Natural Products. 47(3). 550–551. 35 indexed citations

16.

Okano, Masayoshi, et al.. (1983). Constituents in marine algae - VI. Seasonal variation of sterol, hydrocarbon, fatty acid, and phytol fractions in Enteromorpha prolifera (Mueller) J. AGARDH.. NIPPON SUISAN GAKKAISHI. 49(4). 621–626. 5 indexed citations

17.

Okano, Masayoshi, et al.. (1982). Constituents in marine algae - IV. Seasonal variation of sterol,hydrocarbon,and fatty acid fractions in Cladophora densa Harvey.. NIPPON SUISAN GAKKAISHI. 48(6). 815–819. 2 indexed citations

18.

Aratani, Takaaki, et al.. (1981). Constituents in marine algae - III. Seasonal variation of sterol, hydrocarbon, and fatty acid fractions in Codium fragile (Sur.) Hariot.. NIPPON SUISAN GAKKAISHI. 47(3). 391–395. 2 indexed citations

19.

Okano, Masayoshi & Kuo-Hsiung Lee. (1981). Antitumor agents. 43. Conversion of bruceoside-A into bruceantin. The Journal of Organic Chemistry. 46(6). 1138–1141. 11 indexed citations

20.

Okano, Masayoshi & Takaaki Aratani. (1972). Oxidation by Manganese (III) Salts. Journal of Synthetic Organic Chemistry Japan. 30(6). 566–570. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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