Structure Identification: |
Fitoterapia. 2003 Jul;74(5):435-8. | Diterpenoids from Isodon japonica.[Pubmed: 12837357 ] | METHODS AND RESULTS:
A new ent-kaurane diterpenoid maoyecrystal F (1) and its acetonide derivative (2), together with seven known compounds, lasiodonin, maoyerabdosin, Odonicin, enmenin, oridonin, beta-sitosterol and daucosterol, were isolated from the leaves of Isodon japonica. | Journal of the Chemical Society Perkin Transactions 1, 01/1973. | Terpenoids. Part XXV. Structures and absolute configurations of isodoacetal, nodosinin, and odonicin, novel diterpenoids of Isodon japonicus[Reference: WebLink] |
METHODS AND RESULTS:
On the basis of spectroscopic data and chemical evidence, the structure and absolute configuration of isodoacetal (1a), nodosinin (6), and Odonicin (11) have been established. The first two are B-secokaurene derivatives and the third is ent-6α, 15α-diacetoxy-7β,20-epoxy-7α-hydroxykaura-2,16-dien-1-one. Chemical interconversions between isodoacetal and nodosinin have been accomplished.
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