Anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone

for the following products 1,6,7,12-Tetraphenoxyperylene-N,N'-bis(2,6-diisopropylphenyl)-3,4:9,10-tetracarboxdiimide | N,N'-bis(2,6-diisopropylphenyl)-1,6,7,12-tetraphenoxyperylene-3,4,9,10-tetracarboxdiimide and Anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone