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Effect of applied potential Eox on chromatograms recorded for standard sample of maytenin (A) and pristimerin (B). Separation carried out on a Phenomenex Gemini C18 analytical column, (85:15) MeCN-H2O (HOAc aqueous 0.3%), mobile phase, 1.0 mL min‑1. ED conditions: digital filter set at 0.1 s; 30 °C; 0% offset; range 5ηA; Eox: a) 0.8 V; b) 0.7 V; c) 0.6 V; d) 0.5 V; e) 0.4 V.
