1-Ethyl-1-(alpha-naphthyl)-2-(2-aminoethyl)isothiouronium sulfate 63680-01-3 Ammonium, (amino(2-aminoethylthio)methylene)ethylnaphthyl-, sulfate Pseudourea, 2-(2-aminoethyl)-1-naphthyl-2-thio-, ethylsulfate Pseudourea, 2-thio-, 1-ethyl-1-(alpha-naphthyl)-2-(2-aminoethyl)-, sulfate USAF B-81