• Archives of Pharmacal Research
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• v.20 no.2
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• pp.191-193
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• 1997

A new nortriterpene, rhombenone (1) was isolated from the leaves of Hedera rhombea Bean (Araliaceae). The structure of this compound was established as 27-demethyl-20(S)-dammar-23-ene-$6{\alpha}$, 20-diol-3, 25-dione on the basis of spectral analysis including HMQC and HMBC techniques. Rhombenone (1) was the first 27-demethyl nortriterpene of dammarane type isolated from natural sources.

• YAKHAK HOEJI
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• v.19 no.1
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• pp.9-15
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• 1975

The constitution of genin A-a new triterpenoid isolated from the roots of Phytolacca americana L. has been shown to be 3-oxo-30-carbomethoxy-24-norolean-12-en-28-oic acid. This compound is not a genuine spogenin but an artifact produced during hydrolysis of the Phyolacca saponins.