4-[(9,10-dihydro-9,10-dioxo-1-anthryl)azo]-N-(1,1-dimethylethyl)-3-hydroxynaphthalene-2-carboxamide

4-[[(9,10-Dihydro-9,10-dioxoanthracen)-1-yl]azo]-N-(1,1-dimethylethyl)-3-hydroxy-2-naphthalenecarboxamide