title: syn-anti Isomerization in testosterone 17-enanthate 3-benzilic acid hydrazone.
abstract: UV spectrophotometry, high-pressure liquid chromatography, and NMR were used to investigate syn-anti isomerization in testosterone 17-enanthate 3-benzilic acid hydrazone. In the crystalline state, the isomeric ratio is dependent on the crystallization solvent. In solutions, including injectable pharmaceutical formulations, an equilibrium isomer mixture (2:1) is formed.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003460:Crystallization; D004355:Drug Stability; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013739:Testosterone / Q000031:analogs & derivatives* / Q000032:analysis
chemical_list: D012996:Solutions; C020510:testosterone 17-enanthate 3-benzilic acid hydrazone; D013739:Testosterone