英文别名Nortropine Impurity 1; (1R,3r,5S)-ethyl 3-hydroxy-8-azabicyclo[3.2.1]octane-8-carboxylate; Ipratropium Bromide Impurity 28; ethyl N-demethyltropine-N-carboxylate; N-carbethoxynortropine; ethyl 3-endo-3-hydroxy-8-azabicyclo[3.3.1]octane-8-carboxylate 
