tetrahydrozoline hydrochloride2-(1,2,3,4-tetrahydro-1-naphthyl)-2-imidazoline hydrochloride2-(1,2,3,4-tetrahydro-1-naphthyl)-2-imidazoline monohydrochloridetetrahydrozoline HCltetrahydrozoline hydrochloridetetrahydrozoline monohydrochloridetetryzoline HCltetryzoline hydrochloridetyzanol hydrochloride