1,1-Diethyl-3-(m-hydroxyphenyl)urea tert-butylcarbamate 73953-76-1 Carbamic acid, (1,1-dimethylethyl)-, 3-[[(diethylamino)carbonyl]amino]phenyl ester NSC222547 Urea, 1,1-diethyl-3-(m-hydroxyphenyl)-, tert-butylcarbamate m-(3,3-Diethylureido)phenyl tert-butylcarbamate