Ent-trachylobane-3β-hydroperoxide, a new diterpene from the root bark of Chrozophora oblongifolia (Fam.; Euphorbiaceae)

Abstract

New ent-trachylobane-3β-hydroperoxide (5) together with four known compounds, ricinine (1), trimethoxy ellagic acid (2), dimethoxy ellagic acid (3) and aleurotolic acid (4) were isolated from the methylene chloride fraction of the root bark of Chrozophora oblongifolia. The structures of these secondary metabolites were elucidated by using different spectral techniques, 1 H NMR, 13 C NMR, HSQC, , HMBC, 1 H-1 H COSY, NOESY, HR-ESI-MS, EI-MS and comparison with published data. Ent-trachylobane-3β-hydroperoxide showed moderate cytotoxic activity by MTT assay method against human breast cancer cells (MCF-7) and human hepatocyte-derived carcinoma cells (Huh-7) with IC 50 values of 24.53 and 34.13 µM, in comparison with IC 50 values of 23.47 µM and 15.82 µM for 5-fluorouracil respectively.

Biological Activity of Endophytic Fungi from the Roots of the Medicinal Plant Vernonia anthelmintica

“…Previously, the antimicrobial activity of the endophytic fungal strain Aspergillus sp. ASCLA from leaf tissues of the medicinal plant Callistemon subulatus was investigated against S. aureus, Pseudomonas aeruginosa, C. albicans, and Saccharomyces cerevisiae and exhibited moderate to high activity [40]. In our case the Aspergillus strain was isolated from the root of this herbal plant.…”