chrysamine

Noun

 * 1)  Any of a group of quinoid derivatives of a phenylhydrazine (typically  (3E)-3-4-[4-[(2E)-2-(3-carboxy-4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]phenyl]phenyl]hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carboxylic acid ); any yellow [[azo dye derived from such a compound