title: A solvent system for the separation of steroids with estrogenic and progestational activity by two-dimensional thin-layer chromatography.
mesh_terms: D002855:Chromatography, Thin Layer / Q000379:methods*; D004967:Estrogens / Q000302:isolation & purification*; D011372:Progestins / Q000302:isolation & purification*; D012997:Solvents
chemical_list: D004967:Estrogens; D011372:Progestins; D012997:Solvents