64051-20-3 AMMONIUM, (m-HYDROXYPHENYL)TRIMETHYL-, METHYLSULFATE, ETHYLCARBAMATE AR-21 Ammonium, (3-(N-ethylcarbamoyloxy)phenyl)trimethyl-, methylsulfate Carbamic acid, N-ethyl-, 3-(trimethylammonio)phenyl ester, methylsulfate Carbamic acid, N-ethyl-, 3-dimethylaminophenyl ester, methosulfate Ethylcarbamic ester of m-oxyphenyltrimethylammonium methylsulfate