. . . . . . . "Nitrazine" . "Nitrazine" . . . "(3E)-3-[(2,4-Dinitrophenyl)hydrazono]-4-oxonaphthalene-2,7-disulfonic acid" . . . . . . . . . . . . . "nitrazine" . . . "Nitrazine yellow; Phenaphthazine" .