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Chromatogram of the crude extract of Andrographis from sample A. Chromolith Performance RP-18e (100 × 4.6 mm ID, 2 µm); solvent A: water; solvent B: MeOH; gradient conditions: solvent B from 40% to 51% over 9 min, at 3 mL min, room temperature. (a) UV at λ = 220 nm, (b) ELSD.
