Affiliation:
1. College of Life Science, Northwest Normal University, Lanzhou 730070, P. R. China
Abstract
A new ent-kaurane diterpenoid, excisoidesin (1), was isolated from the acetone extract of the leaves of Isodon excisoides (Sun ex C. H. Hu) C. Y. Wu et H. W. Li, along with kamebacetal B (2), glaucocalyxin A (3), leukamenin E (4), kamebanin (5) and wangzaozin A (6). The structure of the new compound was determined as 7α,14β,18-trihydroxy- ent-kaur-16-en-3,15-dione by spectroscopic methods. Compound 1–6 showed significant cytotoxic activity against human tumor Bel-7402 cells.
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