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Representative HPLC chromatograms of (a) Phyllanthus amarus (Mal), (b) P. urinaria (Ind) standardized to phyllanthin (1) at RT = 27.251 min and hypophyllanthin (2) at RT = 28.079 min, (c) reference standard (phyllanthin) at 27.265 min, and (d) reference standard (hypophyllanthin) at 27.883 min.
