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[A new C-28 nortriterpenoid from fruits of Leonurus japonicus]
Yuqing Zheng1, He Yan, Jing Han
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
Objective:
To study the chemical constituents from the fruits of Leonurus japonicus.
Method:
The compounds were extracted by 70% methanol, then isolated and purified by column chromatography on silica gel, RP-18, Sephedax LH-20 and HPLC. Their structures were determined on the basis of spectroscopic data and physicochemical property.
Result:
Two 28-noroleanane-derived spirocyclic triterpenoids including a new acylated nortriterpenoid were isolated and identified as (17R)-19(18 --> 17)-abeo-2alpha,18beta,23-trihydroxy-3beta-E-feruloyoxy-28-norolean-12-ene (1) and phlomistetraol B (2).
Conclusion:
Compound 1 is a new compound,named as leonujaponin A. Both compounds 1-2 are isolated for the first time from Leonurus plants.
