title: Separation and characterisation of formaldehydrogenic delta-4-3-oxo-C21-steroids by means of thin-layer chromatography on silica gel.
mesh_terms: D000085:Acetates; D000305:Adrenal Cortex Hormones / Q000032:analysis*; D002000:Bronchospirometry; D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D003116:Color; D005557:Formaldehyde; D005782:Gels; D011374:Progesterone; D012822:Silicon Dioxide; D012997:Solvents; D013696:Temperature
chemical_list: D000085:Acetates; D000305:Adrenal Cortex Hormones; D005782:Gels; D012997:Solvents; D005557:Formaldehyde; D011374:Progesterone; D012822:Silicon Dioxide