Synonyms: 4-Piperidinone,1-hydroxy-2,2,6,6-tetramethyl-, hydrochloride (9CI); 4-Piperidone, 1-hydroxy-2,2,6,6-tetramethyl-,hydrochloride (8CI); 1-Hydroxy-2,2,6,6-tetramethyl-4-piperidone-monohydrogenchloride; 1-Hydroxy-2,2,6,6-tetramethylpiperidin-4-one hydrochloride