Tetrodotoxin. VII. On the Structures of Tetrodotoxin and its Derivatives

Kyosuke Tsuda; Susumu Ikuma; Masaaki Kawamura; Ryuji Tachikawa; Kiyoshi Sakai; Chihiro Tamura; Osamu Amakasu

doi:10.1248/cpb.12.1357

Kyosuke Tsuda, Susumu Ikuma, Masaaki Kawamura, Ryuji Tachikawa, Kiyoshi Sakai, Chihiro Tamura, Osamu Amakasu

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JOURNAL FREE ACCESS

1964 Volume 12 Issue 11 Pages 1357-1374

DOI https://doi.org/10.1248/cpb.12.1357

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Abstract

The structures of both tetrodonic acid hydrobromide and 6, 11-diacetylanhydrotetrodotoxin hydroiodide were established by chemical and X-ray crystallographical research. Based upon structures of both these salts and upon other chemical information, we determined that tetrodotoxin and anhydrotetrodotoxin have zwitterionic hemilactal structures.

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