(R*,S*)-4-Hydroxy-alpha-(1-(methylamino)ethyl)benzyl alcohol hydrochloride 1-(4-Hydroxyphenyl)-2-methylaminopropanol-hydrochlorid 4-Hydroxyephedrin hydrochlorid 942-51-8 Carnigen Diben EINECS 213-392-5 p-Hydroxyephedrine hydrochloride