23239-51-2 Benzenemethanol, 4-hydroxy-.alpha.-[1-[[2-(4-hydroxyphenyl)ethyl]amino]ethyl]-, hydrochloride, (R*,S*)- Benzyl alcohol, p-hydroxy-.alpha.-[1-[(p-hydroxyphenethyl)amino]ethyl]-, hydrochloride, erythro- NSC291565 Ritodrine hydrochloride