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Characterization and Cardiovascular Effects of (13<i>S</i>)-9&#945;,13&#945;-epoxylabda-6&#946;(19),15(14)diol Dilactone, a Diterpenoid Isolated from <i>Leonotis leonurus</i>


KC Obikeze
JM McKenzie
IR Green
P Mugabo

Abstract

A new diterpenoid, (13S)-9α,13α-epoxylabda-6(19),15(14)diol dilactone (1), was isolated from Leonotis leonurus and the structure determined via NMR analysis. The compound causes significant changes in blood pressure of anaesthetized normotensive rats and exhibits a negative chronotropic effect.

Keywords: Leonotis leonurus, diterpenoid, NMR analysis, chronotropic effect


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eISSN: 1996-840X
print ISSN: 0379-4350