四甲基哌啶醇

苯频哪醇

4,4'-Dihydroxy-2,2,2',2',6,6,6',6'-octamethyl-1,1'-ethylenebispiperidine

1-(2-Hydroxy-2,2-diphenylethylethyl)-2,2,6,6-tetramethyl-4-piperidol

1-(9-Hydroxy-9-xanthenyl)methyl-2,2,6,6-tetramethyl-4-piperidol