Formoterol EP Impurity E Catalogue F640575 CAS 1616967-26-0 M.W 358.44 M.F C20H26N2O4 Specifications FAQs Synonyms:N-(2-Hydroxy-5-(1-hydroxy-2-((1-(4-methoxy-3-methylphenyl)propan-2-yl)amino)ethyl)phenyl)formamide