Acetic acid, 2,2'-((9,10-dihydro-9,10-dioxo-1,8-anthracenediyl)diimino)bis(2-oxo-;2,2'-((9,10-Dihydro-9,10-dioxo-1,8-anthracenediyl)diimino)bis(2-oxoacetic) acid;2,2'-[(9,10-dioxo-9,10-dihydroanthracene-1,8-diyl)diimino]bis(oxoacetic acid)
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