trinatrijev 5-benzamido-4-hidroksi-3-(4-metil-2-sulfonatofenilazo)naftalen-2,7-disulfonat
trinatrium-4-amino-5-hydroxi-3-[(E)-4-(vinylsulfonyl)fenylazo]-6-[-2-sulfonato-4-(2-hydroxietylsulfonyl)fenylazo]naftalen-2,7-disulfonat;