This invention relates to novel addition products of isocyanates with oxyalkylene substituted arinophenol compounds as intermediates for {HEAD ~ the production} of {TAIL ~ urethane} substituted xanthene colorants, particularly triphenylmethane derivatives such as rhodamines 
This invention relates to novel addition products of isocyanates with oxyalkylene substituted arinophenol compounds as intermediates for { HEAD ~ the production } of { TAIL ~ urethane } substituted xanthene colorants , particularly triphenylmethane derivatives such as rhodamines
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