Affiliation:
1. Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka-1000, Bangladesh
2. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka-1000, Bangladesh
Abstract
The stem bark of Polyalthia simiarum has yielded a new bisnor-type clerodane diterpenoid, 2-oxo-14,15-bisnor-3,11 E-kolavadien-13-one (1), and three previously known clerodane derivatives, kolavenic acid (2), 16β-hydroxycleroda-3,13(14) Z-dien-15,16-olide (3), and 16-oxocleroda-3,13(14) E-dien-15-oic acid (4). The structures of these compounds were unambiguously determined by extensive NMR studies as well as by comparison with related compounds. Till now this is the second report of the occurrence of any unusual C-18 clerodane diterpenoid from nature. The crude light petroleum extract and the purified compound 3 demonstrated moderate free radical scavenging activity with IC50 values of 21.5 and 23.5 μg/mL, respectively.
Subject
Complementary and alternative medicine,Plant Science,Drug Discovery,Pharmacology,General Medicine
Cited by
1 articles.
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