1,6-Hexanediaminium, N,N'-bis((2,3-dihydroxyphenyl)methyl)-N,N,N',N'-tetramethyl-, dibromide 159662-70-1 Dbtmhd N,N'-(2,3-Dihydroxybenzyl)-N,N,N',N'-tetramethyl-1,6-hexanediamine