Isolation and Characterizations of new alkaloid 3-deoxy- 3, 11-epoxy cephalotaxine from Clitoria ternatea
The present study describes the isolation and structural elucidation of new alkaloid 3-deoxy-3, 11-epoxy cephalotaxine (1) from the flowers of C. ternatea. It was isolated by careful column chromatographic separation of the crude extract on silica gel 60. The structure was established based on UV, IR, 1HNMR, 13CNMR and GC-MS spectroscopy methods. The antibacterial activity of various bacterial and fungal strains and anti-inflammatory activities of the isolated compound and its crude methanol extract was studied. The highest zone of inhibition (13.0 and 12.0 mm) was shown by 1 at a dose of 200 µg/kg against E. coli and S. aureus strains and (16.0, 12.0 mm) against anti-fungal strains of C. albicans and A. flavus. The results indicated that at both dose levels (100 mg and 200 mg / kg) of isolated compound 1 had significant anti-inflammatory activity from 2nd hour onwards. The bioactive compound isolated from this plant can be employed for antimicrobial activity, also for the treatment of various bacterial and fungal infections and to show pronounced anti-inflammatory effects after three hours of injection.
Keywords: Clitoria ternatea, Alkaloid, 3-deoxy-3, 11-epoxy cephalotaxine, Anti-microbial activity, Anti-inflammatory activity
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