Studies on the Constituents of the Root of Cayaponia tayuya (VELL.) COGN. III. Structures of Cayaponosides, 29-Nor-1, 2, 3, 4, 5, 10-hexadehydrocucurbit-6-ene Glucosides

Eiji HIMENO; Tsuneatsu NAGAO; Junko HONDA; Hikaru OKABE; Nobuto IRINO; Tetsuo NAKASUMI

doi:10.1248/cpb.42.2370

Eiji HIMENO, Tsuneatsu NAGAO, Junko HONDA, Hikaru OKABE, Nobuto IRINO, Tetsuo NAKASUMI

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Keywords: Cayaponia tayuya, Cucurbitaceae, cayaponoside, bitter triterpene glucoside, 29-nor-1, 2, 3, 4, 5, 10-hexadehydrocucurbit-6-ene glucoside

JOURNAL FREE ACCESS

1994 Volume 42 Issue 11 Pages 2370-2372

DOI https://doi.org/10.1248/cpb.42.2370

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Abstract

The bitter constituents in the root of Cayaponia tayuya (VELL.) COGN. were investigated. Among 24 29-norcucurbitacin glucosides, named cayaponosides, the structures of cayaponosides A₅, B₅, C₄, C_5b and D₂ were determined based mainly on spectral analyses. They are all glucosides of 29-nor-1, 2, 3, 4, 5, 10-hexadehydrocucurbit-6-enes different only in side chain structure.

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