57513-78-7 Pyrimidine, 2-(2,6-dichlorobenzylidenehydrazino)-3,4,5,6-tetrahydro-, hydrochloride, (sym)- Pyrimidine, 3,4,5,6-tetrahydro-2-(2,6-dichlorobenzylidenehydrazino)-, hydrochloride, (sym)- sym-2-(2,6-Dichlorobenzylidenehydrazino)-3,4,5,6-tetrahydropyrimidine hydrochloride