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HPLC Chromatograms Polyphenol Standards and Extracts alone and combined and Retention Time %. (a) HPLC Chromatogram of polyphenol Standards and Retention Time. (b) HPLC Chromatogram of Ocimum sanctum polyphenols and Retention Time. (c) HPLC Chromatogram of Zingiber officinale polyphenols and Retention Time. (d) HPLC Chromatogram of Piper nigrum polyphenols and Retention Time. (e) HPLC Chromatogram of combined (O. Sanctum+ Z. officinale + P. nigrum) polyphenols and Retention Time.
