1,3-Diethyl-1,3-diphenylurea
1,4-Diamino Anthraquinone
1,5-Diaminoanthrarufin
1-Acetamido-7-hydroxynaphthalene
1-Amino-7-naphthol
1-Naphthyl Isocyanate
2,4-Dichlorophenyl Isocyanate
2,4-Dichlorophenylhydrazine Hydrochloride
2-Amino-4-chlorophenol-6-sulfonic Acid
2-Chlorobenzonitrile
2-Naphthol
3,5-Diaminobenzoic Acid