2313-91-9 3-(1,1-Dimethylethyl)phenyl acetylmethylcarbamate AI3-27264 BRN 1983436 Carbamic acid, acetylmethyl-, 3-(1,1-dimethylethyl)phenyl ester Carbamic acid, acetylmethyl-, m-tert-butylphenyl ester ENT 27,264 U-24157 Upjohn U-24157