Kô Sugama

531 total citations
15 papers, 451 citations indexed

About

Kô Sugama is a scholar working on Molecular Biology, Plant Science and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Kô Sugama has authored 15 papers receiving a total of 451 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Molecular Biology, 7 papers in Plant Science and 5 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Kô Sugama's work include Natural product bioactivities and synthesis (6 papers), Phytochemistry and Biological Activities (4 papers) and Natural Compound Pharmacology Studies (3 papers). Kô Sugama is often cited by papers focused on Natural product bioactivities and synthesis (6 papers), Phytochemistry and Biological Activities (4 papers) and Natural Compound Pharmacology Studies (3 papers). Kô Sugama collaborates with scholars based in Japan and China. Kô Sugama's co-authors include Hiroshi Mitsuhashi, Kôji Hayashi, Minoru Okada, Yukinobu Ikeya, Masao Chin, Takashi Morota, Hiroshi Sasaki, Hiroaki Nishimura, Kô Kaneko and Takao Katsuhara and has published in prestigious journals such as Phytochemistry, Tetrahedron Letters and Chemical and Pharmaceutical Bulletin.

In The Last Decade

Kô Sugama

15 papers receiving 429 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Kô Sugama Japan 13 313 271 79 57 57 15 451
Guo‐Jun Xu China 15 354 1.1× 181 0.7× 59 0.7× 104 1.8× 60 1.1× 22 482
Anki Takushi Japan 15 450 1.4× 419 1.5× 59 0.7× 42 0.7× 50 0.9× 23 614
Lee-Juian Lin United States 14 233 0.7× 158 0.6× 40 0.5× 95 1.7× 76 1.3× 19 401
Jianbei Li China 13 263 0.8× 190 0.7× 57 0.7× 51 0.9× 42 0.7× 19 427
M. Hani A. Elgamal Egypt 12 281 0.9× 206 0.8× 78 1.0× 30 0.5× 47 0.8× 29 427
Aina Lao China 16 349 1.1× 188 0.7× 120 1.5× 79 1.4× 46 0.8× 32 531
Hiroko Karasawa Japan 8 406 1.3× 371 1.4× 74 0.9× 21 0.4× 23 0.4× 9 501
Hong-Yen Hsū Japan 15 376 1.2× 185 0.7× 33 0.4× 101 1.8× 61 1.1× 34 543
Yasunobu Asao Japan 10 327 1.0× 134 0.5× 44 0.6× 63 1.1× 81 1.4× 15 545
Ana Marı́a Silván Spain 10 298 1.0× 324 1.2× 70 0.9× 68 1.2× 83 1.5× 15 584

Countries citing papers authored by Kô Sugama

Since Specialization
Citations

This map shows the geographic impact of Kô Sugama'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 Kô Sugama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kô Sugama more than expected).

Fields of papers citing papers by Kô Sugama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kô Sugama. 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 Kô Sugama. The network helps show where Kô Sugama may publish in the future.

Co-authorship network of co-authors of Kô Sugama

This figure shows the co-authorship network connecting the top 25 collaborators of Kô Sugama. A scholar is included among the top collaborators of Kô Sugama 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 Kô Sugama. Kô Sugama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

15 of 15 papers shown
1.
Sato, Toshitsugu, Hiroshi Sasaki, Kô Sugama, et al.. (1998). Four New Bisbenzylisoquinoline Alkaloids from the Root of Stephania tetrandra (Fen-Fang-Ji). Natural medicines = 生薬學雜誌. 52(2). 124–129. 3 indexed citations
2.
Yamaguchi, Takuji, Toshitsugu Sato, Hiroshi Sasaki, et al.. (1997). Studies on Inhibitory Activity against Acetylcholinesterase of New Bisbenzylisoquinoline Alkaloid and Its Related Compounds. Heterocycles. 45(11). 2253–2253. 15 indexed citations
3.
Morota, Takashi, Katsuyuki Aoki, Kô Sugama, et al.. (1995). A new nor-triterpenoid, triptolactone, with a novel carbon skeleton from Tripterigium wilfordii. Tetrahedron Letters. 36(35). 6291–6292. 3 indexed citations
4.
Sasaki, Hiroshi, Takashi Morota, Hiroaki Nishimura, et al.. (1991). Norcarotenoids of Rehmannia glutinosa var. Hueichingensis. Phytochemistry. 30(6). 1997–2001. 29 indexed citations
5.
Ikeya, Yukinobu, Kô Sugama, Minoru Okada, & Hiroshi Mitsuhashi. (1991). Two xanthones from Polygala tenuifolia. Phytochemistry. 30(6). 2061–2065. 52 indexed citations
6.
Shigemori, Hideyuki, et al.. (1991). Eudistomidins E and F, new β-carboline alkaloids from the okinawan marine tunicate Eudistoma glaucus. Tetrahedron Letters. 32(29). 3539–3542. 26 indexed citations
7.
Ikeya, Yukinobu, Kô Sugama, Minoru Okada, & Hiroshi Mitsuhashi. (1991). Two lignans from Schisandra sphenanthera. Phytochemistry. 30(3). 975–980. 29 indexed citations
8.
Ikeya, Yukinobu, Kô Sugama, Minoru Okada, & Hiroshi Mitsuhashi. (1991). Four New Phenolic Glycosides from Polygala tenuifolia.. Chemical and Pharmaceutical Bulletin. 39(10). 2600–2605. 55 indexed citations
9.
Morota, Takashi, Hiroshi Sasaki, Kô Sugama, et al.. (1990). Two non-glycosidic iridoids from Rehmannia glutinosa. Phytochemistry. 29(2). 523–526. 19 indexed citations
10.
Morota, Takashi, Hiroaki Nishimura, Hiroshi Sasaki, et al.. (1989). Five cyclopentanoid monoterpenes from Rehmannia glutinosa. Phytochemistry. 28(9). 2385–2391. 39 indexed citations
11.
Morota, Takashi, Hiroshi Sasaki, Hiroaki Nishimura, et al.. (1989). Two iridoid glycosides from Rehmannia glutinosa. Phytochemistry. 28(8). 2149–2153. 61 indexed citations
12.
Sugama, Kô & Kôji Hayashi. (1988). A glycoside from dried roots of Cynanchum paniculatum. Phytochemistry. 27(12). 3984–3986. 14 indexed citations
13.
Sugama, Kô, Kôji Hayashi, Hiroshi Mitsuhashi, & Kô Kaneko. (1986). Studies on the constituents of asclepiadaceae plants. LXVI The structures of three new glycosides, cynapanosides A, B, and C, from the Chinese drug "Xu-Chang-Qing," Cynanchum paniculatum Kitagawa.. Chemical and Pharmaceutical Bulletin. 34(11). 4500–4507. 36 indexed citations
14.
Sugama, Kô, Kôji Hayashi, & Hiroshi Mitsuhashi. (1985). Eremophilenolides from petasites japonicus. Phytochemistry. 24(7). 1531–1535. 45 indexed citations
15.
Sugama, Kô, Kôji Hayashi, Takashi Nakagawa, Hiroshi Mitsuhashi, & Naotoshi Yoshida. (1983). Sesquiterpenoids from petasites fragrans. Phytochemistry. 22(7). 1619–1622. 25 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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