2-[p-[N-(2-Acetoxyethyl)-N-(2-methoxyethyl)amino]phenylazo]-5-(p-nitrophenylazo)-3-thiophenecarbonitrile;4-[3-Cyano-5-(4-nitrophenylazo)-2-thienylazo]-N-(2-acetoxyethyl)-N-(2-methoxyethyl)aniline
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