title: Gas-liquid chromatographic separation of the optical isomers of some "ephedrines" and "pseudoephedrines".
mesh_terms: D002849:Chromatography, Gas; D004809:Ephedrine / Q000302:isolation & purification*; D005461:Fluorine; D007536:Isomerism; D008433:Mathematics; D008968:Molecular Conformation; D009905:Optical Rotatory Dispersion
chemical_list: D005461:Fluorine; D004809:Ephedrine