(2S,2'S)-2,2'-(1,3,8,10-Tetraoxoanthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-2,9(1H,3H,8H,10H)-diyl)dipropanoic acid

(2S,2'S)-2,2'-(1,3,8,10-Tetraoxoanthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-2,9(1H,3H,8H,10H)-diyl)dipropanoic acid