Di-tert-butylbisphenol A

4,4'-isopropylidenebis[2,6-di-tert-butylphenol]

4,4'-(1-Methylethylidene)bis[2,6-bis(1,1-dimethylethyl)phenol]

Phenol, 4,4'-(1-methylethylidene) bis[2,6-bis(1,1-dimethylethyl)-