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HPLC chromatogram (280 nm) of (A) methanol extract of NPF; (B) ethyl acetate extract of NPF; (C) authentic standards – 1. Gallic acid, 2. protocatechuic acid, 3. catechol, 4. chlorogenic acid, 5. vanillic acid, 6. syringic acid, 7. p-coumaric acid, 8. ferulic acid, 9. rutin hydrate, 10. ellagic acid, 11. Quercetin
