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