title: Improvements in the synthesis of pentylenetetrazol-10-14C.
mesh_terms: D000645:Ammonium Sulfate; D001345:Autoradiography; D001386:Azides; D002250:Carbon Radioisotopes; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003460:Crystallization; D003510:Cyclohexanes; D007553:Isotope Labeling; D008722:Methods; D010433:Pentylenetetrazole / Q000138:chemical synthesis* / Q000302:isolation & purification
chemical_list: D001386:Azides; D002250:Carbon Radioisotopes; D003510:Cyclohexanes; D000645:Ammonium Sulfate; D010433:Pentylenetetrazole