Synonyms: 7,7’-Dimethyl-6,6’-dihydroxy-4,4,4’,4’-tetramethylbis-2,2’-spirochroman;6,6'-DIHYDROXY-4,4,4',4',7,7'-HEXAMETHYL-2,2'-SPIROBICHROMAN;6,6'-DIHYDROXY-4,4,4',4',7,7'-HEXAMETHYL-2,2'-SPIROBICHROMAN, 2-PROPANOL ADDUCT;6,6'-DIHYDROXY-4,4,4',4',7,7'-HEXAMETHYL-2,2'-SPIROBISCHROMAN;Dihydroxyhexamethylspirobichroman;2,2'-spirobi(6-hydroxy-4,4,7-trimethylchromane)