Two-dimensional qNMR of anthraquinones in Frangula alnus (Rhamnus frangula) using surrogate standards and delay time adaption - Serhat S. Çiçek and Tommaso Ugolini and Ulrich Girreser (Analytica chimica acta : an international journal devoted to all branches of analytical chemistry, 2019)
Keywords: Duroquinone; Natural product; Quality control; Quantitative NMR; Rutin; Surrogate analytes