2-Naphthalenol,1-[(2-hydroxy-4-nitrophenyl)azo]- (9CI); 2-Naphthol,1-[(2-hydroxy-4-nitrophenyl)azo]- (7CI,8CI);1-[(2-Hydroxy-4-nitrophenyl)azo]-2-naphthol; Zaponecht Violet BE
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