Abstract Background The objectives of the current study are to evaluate traditionally used medicinal plants Andrographis paniculata for in vitro anti-malarial activity against human malarial parasite Plasmodium falciparum and further characterize active extract A. using spectroscopic chromatographic methods. Results chloroform displayed with IC 50 values 6.36 μg/ml 3D7 strain 5.24 K1 strains re...

To engineer Nicotiana benthamiana to produce novel diterpenoids, we first aimed increase production of the diterpenoid precursor geranylgeranyl pyrophosphate (GGPP) by up-regulation key genes non-mevalonate (MEP) pathway sourced from Arabidopsis thaliana. We used transient expression evaluate combinations eight MEP plus GGPP synthase and a Jatropha curcas casbene (JcCAS) identify an optimal com...

A highly congested decalin embodying an alpha-methylene ketone is synthesized in 11 steps from the Wieland-Miescher ketone and efficiently converted to the polycyclic frameworks of anominine and tubingensin A, which constitutes the first approach to the skeleton of these indole diterpenoids.

Two new 12-hydroxybriarane diterpenoids, designated as excavatoids O (1) and P (2), were isolated from the octocoral Briareum excavatum. The structures of briaranes 1 and 2 were established on the basis of extensive spectral data analysis. Excavatoid P (2) is the first metabolite which possesses a 6β -chlorine atom in briarane analogues.

Two new briarane-related diterpenoids, designated as excavatoids E (1) and F (2), were isolated from the cultured octocoral Briareum excavatum. The structures of compounds 1 and 2 were established on the basis of extensive spectral data analysis. Briaranes 1 and 2 were found to exhibit moderate inhibitory effects on elastase release by human neutrophils.

The biological activities of natural abietane acids and their derivatives have been reviewed from 1967 to 1992. Antimicrobial, antiulcer, and cardiovascular activities are the most representative for this class of diterpenoids, while others like allergenic, antiallergic, filmogenic, surfactant, antifeedant, etc. activities, which determine several uses of abietane acids, have also been reported.