Journal
CHEMICAL & PHARMACEUTICAL BULLETIN
Volume 62, Issue 3, Pages 267-273Publisher
PHARMACEUTICAL SOC JAPAN
DOI: 10.1248/cpb.c13-00812
Keywords
Caesalpinia echinata; Leguminosae; cassane diterpene; echinalide; nuclear factor kappa B
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Seven new cassane-type diterpenoids, echinalides A-G (1-7), were isolated from the stem of Caesalpinia echinata LAM. (Leguminosae). The structures were established on the basis of their chemical properties and spectroscopic evidence, including two dimensional (2D)-NMR analysis. These compounds were assessed for inhibitory activity against nuclear factor kappa B (NF-kappa B). Echinalides C and D, in particular, significantly inhibited NF-kappa B-responsive reporter gene expression at 5.0 mu m, an effect almost equivalent to that of parthenolide, a known potent inhibitor of NF-kappa B.
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