N1,N1-Dimethylbenzene-1,4-diamine dihydrochloride4-Amino-N,N-dimethylaniline dihydrochloride4-(Dimethylamino)aniline dihydrochlorideN,N-Dimethyl-p-phenylenediamine dihydrochloride4-氨基-N,N-二甲基苯胺 二盐酸盐DMPPDA · 2HCl1-N,1-N-dimethylbenzene-1,4-diamine dihydrochlorideN,N-二甲基对苯二胺 二盐酸盐DMPD · 2HClN,N-DIMETHYL-p-PHENYLENEDIAMINE DIHYDROCHLORIDEN,N-二甲基对苯二胺二盐酸盐4-Dimethylaminoaniline dihydrochloride