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Li, B.L.

Taibaijaponicains C and D: two new diterpenoids from Isodon japonica.

Two new C-20-oxygenated ent-kaurene diterpenoids, taibaijaponicains C and D, together with five known compounds, were isolated from the ethanol extract of the leaves and branches of Isodon japonica (Burm. f.) Hara. The structures of new compounds were elucidated as 1 alpha-aectoxy-7 beta,12 beta,15 alpha-trihydroxy-16 alpha-hydroxymethyl-7,20-epoxy- ent-kaurane and 1 alpha-acetoxy-2 beta,3 alpha,6 beta,7 beta,12 beta-pentahydroxy-7,20;19,20-diepoxy- ent-kaur-16-en-15-one, respectively, on the basis of detailed spectroscopic analysis.[1]

References

Taibaijaponicains C and D: two new diterpenoids from Isodon japonica. Li, B.L. Planta Med. (2002) [Pubmed]

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