3,4,9,10-Perylenetetracarboxylic 3,4:9,10-diimide 3,4,9,10-Perylenetetracarboxylic acid diimide 81-33-4 Anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone NSC16842 Perylimid