1-(beta-Naphthyl)-2-(2-aminoethyl)isothiouronium sulfate 63680-04-6 Pseudourea, 2-(2-aminoethyl)-1-(beta-naphthyl)-2-thio-, hydrogen sulfate Pseudourea, 2-thio-1-(beta-naphthyl)-2-(2-aminoethyl)-, sulfate USAF B-77