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Diterpenoids from Isodon eriocalyx var. laxiflora
1Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Yunnan, P.R. China.
Phytochemistry
|April 1, 1995
Abstract:
Three new, seco-ent-kaurane diterpenoids, laxiflorins A, B and C, together with four known diterpenoids eriocalyxin B, oriodonin, and maeocrystals A and B, were isolated from the leaves of Isodon eriocalyx var. laxiflora. Their structures were assigned by a combination of one- and two-dimensional NMR techniques and computer modeling calculations. Laxiflorin C displayed weak cytotoxic activity.