Bioassay-Guided Isolation and Identification of Antiplasmodial Compounds from the Stem Bark of Clausena excavata.
Planta Med
; 89(12): 1165-1169, 2023 Oct.
Article
in En
| MEDLINE
| ID: mdl-37414059
ABSTRACT
Clausena excavata is a medicinal plant widely distributed in Southeast Asia. It is used for a variety of indications, including to treat malaria. In our present study, a phytochemical study of the methanol extract from the stem bark of C. excavata led to the isolation of five pyranocoumarins, nordentatin (1 ), dentatin (2 ), kinocoumarin (3 ), clausarin (4 ), and clausenidin (5 ), and a coumarin, 8-hydroxy-3â³,4â³-dihydrocapnolactone-2',3'-diol (6 ). The isolation of compound 6 from C. excavata and the antiplasmodial activities against a multidrug-resistant K1 strain of Plasmodium falciparum of 1, 3 , and 5 were reported for the first time. Compounds 3 and 4 exhibited potent antiplasmodial activities with EC50 values of 1.10 and 0.58 µM, respectively, while 1 and 5 had EC50 values of 5.62 and 7.15 µM, respectively. A prenyl group attached to the C-3 or C-12 position on the pyranocoumarin ring probably plays an important role on the activity. A hydroxyl group at the C-10 position is also likely to enhance the activity.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plants, Medicinal
/
Clausena
/
Antimalarials
Type of study:
Diagnostic_studies
Language:
En
Journal:
Planta Med
Year:
2023
Document type:
Article
Affiliation country:
Thailand