9,10-dihydro-9,10-[o]-benzenoanthracene-1,4-diol

N-(4-nitrophenyl)-9H-xanthen-9-amine

4-nitro-benzenesulfonic acid trans-cinnamylidenehydrazide

N-Xanthen-9-yl-toluol-4-sulfonamid

1,1,2,2-tetrakis(4-chlorophenyl)ethane-1,2-diol