Roxadustat Impurities
English synonyms:1-Pyrrolidinecarboxylic acid, 3-(2-bromoacetyl)-4-ethyl-, phenylmethyl ester, (3S,4S)-;Benzyl (3S,4S)-3-(2-bromoacetyl)-4-ethylpyrrolidine- 1-carboxylate;Roxadustat Impurity 88;Upadacitinib Impurity 38(3S,4S)-3-(2-Bromoacetyl)-4-ethylpyrrolidine-1-carboxylic acid benzyl ester