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Kozo Hokama

University of the Ryukyus

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Publication

Featured researches published by Kozo Hokama.

Phytochemistry | 1987

Triterpenes from the leaves of parsonsia laevigata

Kazuhito Ogihara; Matsutake Higa; Kozo Hokama; Takayuki Suga

Abstract A novel taraxerane-type triterpene-diol, in addition to taraxerol and lupeol, was isolated from the leaves of Parsonsia laevigata . Its structure was shown to be (4β)-D-friedoolean- 14-ene-3β,24-diol (taraxer- 14-ene-3β,24-diol) by a combination of chemical and spectroscopic methods.

Bulletin of the Chemical Society of Japan | 1987

Synthesis of arylthio-substituted 3,8-diphenyl-1,2-diazacycloocta-2,4,6,8-tetraenes and their thermolysis.

Seiichi Yogi; Kozo Hokama; Sadamori Takayoshi; Otohiko Tsuge

Bulletin of the Chemical Society of Japan | 1986

Synthesis of Stable 1,2-Diazocines, 4,7-Disubstituted 3,8-Diaryl-1,2-diazacycloocta-2,4,6,8-tetraenes, and Their Thermolysis

Seiichi Yogi; Kozo Hokama; Kazunori Ueno; Otohiko Tsuge

Chemistry Letters | 1982

A STABLE 1,2-DIAZOCINE SYSTEM: 3,8-DIPHENYL-l,2-DIAZACYCLOOCTA-2,4,6,8-TETRAENES

Seiichi Yogi; Kozo Hokama; Otohiko Tsuge

Bulletin of the Chemical Society of Japan | 1987

Preparation of Arylsulfonyl-Substituted 3,8-Diphenyl-1,2-diazacycloocta-2,4,6,8-tetraenes and Their Thermolysis

Seiichi Yogi; Kozo Hokama; Otohiko Tsuge

Chemistry Letters | 1987

Novel ring contraction of 1,2-diazocine system. Hydrolysis of 7-substituted 4-acetoxy- and 4-phthalimido-3,8-diphenyl-1,2-diazocines leading to the formation of pyrazoles

Seiichi Yogi; Kozo Hokama; Otohiko Tsuge

Chemical & Pharmaceutical Bulletin | 1987

A NEW BROMINATED NAPHTHOQUINONE FROM DIOSPYROS MARITIMA BLUME

Matsutake Higa; Kayo Himeno; Seiichi Yogi; Kozo Hokama

Bulletin of the College of Science,University of the Ryukyus | 1987

Studies on the constituents of Melicope triphylla Merr.

Matsutake Higa; Seiichi Yogi; Kozo Hokama; 松武 比嘉; 誠一 与儀; 宏三 外間

琉球大学理学部紀要 | 1983

ミツバハマゴウVitex trifolia.L.の成分研究

松武 比嘉; 誠一 与儀; 宏三 外間; Matsutake Higa; Seiichi Yogi; Kozo Hokama

琉球大学理学部紀要 | 1983

コバフンギTrema cannabina Lourの成分研究

松武 比嘉; 良一 宮城; 誠一 与儀; 宏三 外間; Matsutake Higa; Yoshikazu Miyagi; Seiichi Yogi; Kozo Hokama

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Seiichi Yogi

University of the Ryukyus

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Matsutake Higa

University of the Ryukyus

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Otohiko Tsuge

Kyushu University

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Kayo Himeno

University of the Ryukyus

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Kazuhito Ogihara

University of the Ryukyus

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Kazunori Ueno

Tohoku University

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Takayuki Suga

Hiroshima University

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