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