Abstract
A new, 4-(2-propenyl)-phenyl angelate (1 ) and four known phenylpropanoids (2 - 5 ), were isolated from Pimpinella isaurica , a species endemic in Turkey. One new sesquiterpene, 1-methyl-4-(5-methyl-1-methylenehex-4-enyl)-7-oxabicyclo[4.1.0]heptane (6 ) was obtained from P. aurea and two known phenylpropanoids were isolated (7, 8 ), from P. corymbosa . The structure elucidation of the new compounds 1 and 6 was achieved by a combination of one- (1 H, and 13 C) and two-dimensional NMR techniques (G-DQF-COSY, G-HMQC, and G-HMBC) and LC-ESI-FTMS. Compounds 1 , 2 , 4 , 6, 7, 8 have been evaluated for their antimalarial and antimicrobial activities. Compound 1 , 2 , 4 , 6 , 8 had antimicrobial activity against Mycobacterium intracellulare with IC50 values of 7.0, 15.0, 2.5, 10.0 and 1.5 μg/mL, respectively.
Key words
Pimpinella isaurica
-
Pimpinella aurea
-
Pimpinella corymbosa
- Apiaceae - phenylpropanoid - sesquiterpene - antimalarial activity - antimicrobial activity
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Ikhlas A. Khan, Ph.D.
National Center for Natural Products Research
Research Institute of Pharmaceutical Sciences
Department of Pharmacognosy
School of Pharmacy
The University of Mississippi
University
MS 38677
USA
Phone: +1-662-915-7821
Fax: +1-662-915-7062
Email: ikhan@olemiss.edu