Synonyms: Anthra(2,1,9-def:6,5,10-def)diisoquinoline-1,3,8,10(2H,9H)-tetrone,2,9-bis(2,5-bis(1,1-dimethylethyl)phenyl)-;Anthra[2,1,9-def:6,5,10-d'e'f ']diisoquinoline-1,- 3,8,10(2H,9H)-tetrone,2,9-bis[2,5-bis(1,1- dimethylethyl)phenyl]-;N,N'-Bis(2,5-di-tert-butylphenyl)-3,4,9,10-perylenedicarboximide;