2,2-Bis(4-aminophenyl)propane 2,2-Bis(p-aminophenyl)propane 2479-47-2 4,4'-Diaminodiphenylpropane 4,4'-Isopropylidene dianiline 4,4'-Isopropylidenedianiline Aniline, 4,4'-isopropylidenedi- Benzenamine, 4,4'-(1-methylethylidene)bis- NSC33421