18527-76-9 3-(3,4-Dihydroxyphenethyl)amino-4-amino-pyridine dihydrobromide 4-(2-((4-Amino-3-pyridyl)amino)ethyl)pyrocatechol dihydrobromide Pyrocatechol, 4-(2-((4-amino-3-pyridyl)amino)ethyl)-, dihydrobromide