1H-Imidazol-2-amine, 4,5-dihydro-N-(2-chloro-4-methylphenyl)-, monohydrochloride 2-(2-Chloro-4-methylphenylamino)-2-imidazoline hydrochloride 4201-22-3 56360-30-6 ST 375 Tolonidine hydrochloride