5,5-dimethylcyclohexane-2-(2'-hydroxyphenyl)hydrazono-1,3-dione
2-Benzhydryl-2-methyl-benz[1,3]oxathiol
2-[(2-hydroxy-phenyl)-hydrazono]-3-oxo-pentanedioic acid diethyl ester
2-hydroxy-5-((2-hydroxyphenyl)diazenyl)benzaldehyde
2-azulen-1-yl-trans-azo-phenol