Composition #1: Muller, A., Ganzera, M., Stuppner, H. Analysis of phenolic glycosides and saponins in Primula elatior and Primula veris (primula root) by liquid chromatography, evaporative light scattering detection and mass spectrometry . journal of chromatography a, 2006, vol. 1112, no. 1-2, p. 218–223. DOI: 10.1016/j.chroma.2005.10.067.
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