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Anthraquinone

Nitrodyphenylamine

Azo

oxidized indigo

reduced indigo

Anthroquinone

Indigoid

diazo component for azoic dye

coupling component for azoic dyes

azoic chromophore

blue is azo, teal is hydroxyl, for acid dye

blue is anthraquinode, teal is nitro, teal is amide group (teal means auxochrome)

1:1 prematalized acid dye

1:2 prematlized acid dye

basic dye (green 4) with a N^+ chromophore

basic dye (yellow 11) with a N^+ chromophore

disulfide linkage