(R,R)-Eformoterol tartrate (R,R)-Formoterol tartrate 200815-49-2 208102-41-4 Arformoterol Tartrate [USAN] Arformoterol tartrate Formamide, N-(2-hydroxy-5-((1R)-1-hydroxy-2-(((1R)-2-(4-methoxyphenyl)-1-methylethyl)amino)ethyl)phenyl)-, (2R,3R)-2,3-dihydroxybutanedioate (1:1) (salt)