1-tert-Butyl-3-(m-hydroxyphenyl)urea tert-butylcarbamate 73953-68-1 Carbamic acid, (1,1-dimethylethyl)-, 3-[[[(1,1-dimethylethyl)amino]carbonyl]amino]phenyl ester NSC222542 Urea, 1-tert-butyl-3-(m-hydroxyphenyl)-, tert-butylcarbamate m-(3-tert-Butylureido)phenyl tert-buthylcarbamate