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  Indian J Med Microbiol
 

Figure 2: Comparative chromatograms of p–Coumaric acid. (A) Standard of p-Coumaric acid, (B) Juice extract of unripe pineapple and (B) Methanol extract of unripe pineapple. p-Coumaric acid was detected at 16.16 min in standard and juice extract of unripe pineapple under 280 nm wavelength using gradient elution method of 0.5% H3PO4 and 100% ACN as mobile phases and flow rate at 0.8 min/mL

Figure 2: Comparative chromatograms of <i>p</i>–Coumaric acid. (A) Standard of <i>p</i>-Coumaric acid, (B) Juice extract of unripe pineapple and (B) Methanol extract of unripe pineapple. <i>p</i>-Coumaric acid was detected at 16.16 min in standard and juice extract of unripe pineapple under 280 nm wavelength using gradient elution method of 0.5% H<sub>3</sub>PO<sub>4</sub> and 100% ACN as mobile phases and flow rate at 0.8 min/mL