title: [Quantitative determination of the tannin-precursors and the tannins in Ephedra helvetica (author's transl)].
mesh_terms: D002392:Catechin / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000032:analysis*; D012621:Seasons; D013634:Tannins / Q000302:isolation & purification*
chemical_list: D013634:Tannins; D002392:Catechin
vernacular_title: Quantitative Bestimmung der Gerbstoffbildner und der Gerbstoffe in Ephedra helvetica