|Pyrocalciferol||Pyrocarbonic Acid Diethyl Ester||Pyrocatechol||Pyrogallol||Pyrolan|
|Systematic (IUPAC) name|
|Trade names||Benedorm, Didropyridine, Dihydroprylone, Persedon, Presidon, Pyridion, Pyridione, Pyrithyldion, Pyrithyldione, Tetridin, Tetridine|
|Mol. mass||167.205 g/mol|
|(what is this?)|
Pyrithyldione (Presidon, Persedon) is a psychoactive drug invented in 1949. An improved method of manufacture was patented by Roche in 1959. It was used as a hypnotic or sedative and presumed to be less toxic than barbiturates. Today, this substance is no longer used. Agranulocytosis was sometimes reported as adverse effect.