17124-71-9 2-(2-Aminoethyl)-1-(1-naphthyl)-2-thiopseudourea dihydrobromide 2-Aminoethyl-N'-alpha-naphthylisothiuronium bromide hydrobromide Pseudourea, 2-(2-aminoethyl)-1-(1-naphthyl)-2-thio-, dihydrobromide