Novel addition products of isocyanates with oxyalkylene substituted aminophenol compounds as {TAIL ~ intermediates} for the production of urethane substituted xanthene colorants, {HEAD ~ particularly triphenylmethane derivatives} such as rhodarnines, are provided 
Novel addition products of isocyanates with oxyalkylene substituted aminophenol compounds as { TAIL ~ intermediates } for the production of urethane substituted xanthene colorants , { HEAD ~ particularly triphenylmethane derivatives } such as rhodarnines , are provided
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