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J Asian Nat Prod Res. 2013;15(1):30-4. doi: 10.1080/10286020.2012.742509. Epub 2013 Jan 3.

Two new ent-3,4-seco-labdane diterpenoids from Callicarpa nudiflora.

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  • 1Hainan Provincial Key Laboratory of R&D on Tropical Medicinal Plants, Hainan Medical College, Haikou 571199, China.


Two new ent-3,4-seco-labdane diterpenoids, methylcallicarpate (1) and callicarpic acid (2), were isolated from the leaves of Callicarpa nudiflora Hook et Arn. Their structures and relative configurations were established by analysis of spectroscopic data. Their absolute configurations were assigned by the application of the CD technique for the first time among the ent-3,4-seco-labdane-type diterpenes.

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