6,7-Seco- ent -kaurane-type diterpenoids from Isodon eriocalyx var. laxiflora

作者: Wei-Guang Wang , Bing-Chao Yan , Xiao-Nian Li , Xue Du , Hai-Yan Wu

DOI: 10.1016/J.TET.2014.08.018

关键词:

摘要: Twenty nine 6,7-seco-ent-kaurane-type diterpenoids including 18 new ones, laxiflorolides C-T (1-18), along with 21 known ones were obtained from Isodon eriocalyx var. laxiflora. Laxiflorolides E-G (3-5) are the first identified naturally occurring 6,7-seco-ent-kauranoids that feature a 3,6-epoxy unit, and laxi-florolide M (11) is 6-nor-6,7-seco-ent-kauranoid. The absolute configurations of compounds 1, 3, 6, 11 determined by single-crystal X-ray diffraction analyses. cytotoxic activity isolates was evaluated an MTF assay. (C) 2014 Elsevier Ltd. All rights reserved.

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