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In this study, NMR and GC-MS based comparative metabolomic profiling of the roots of three different species namely,  Plumbago indica ,  P. auriculata  and  P. zeylanica  were investigated followed by multivariate statistical analyses and their antioxidant activity. Also, two alkylated phenols i.e., 2,6-di- tert -butyl phenol and 2,4-di- tert -butyl phenol not reported earlier from this taxon were isolated from  P. indica . This metabolic study resulted in the identification of 25 and quantification of 18 metabolites. Principal component analysis showed the clear distinction among the three species. The antioxidant activity in the extracts was tested by free radical scavenging method. The three  Plumbago  species revealed interesting antioxidant potential, in particular,  P. indica , which was rich in naphthoquinones, coumarins, alkylated phenols, sterols, triterpenes, fatty acids showed lowest IC 50  value. The results highlighted the role of  P. indica  in the management of oxidative stress especially when they are utilized in the formation of fermented food products.

natural product research

Comparative metabolic profiling, isolation of alkylated phenols and antioxidant activity of roots of  Plumbago  species using GC-MS and NMR based metabolomics study