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US07066969B2 Dyes incorporating annionic and cationic groups 失效
含有阳离子和阳离子基团的染料

Dyes incorporating annionic and cationic groups
摘要:
The present invention relates to novel compounds of the formulae A, D1, D2, R1 and n are as defined in the description the compounds being in an internal or external salt form, or mixtures of compounds (1) and (2), a process for their preparation and preparations containing them used for dyeing paper.
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