英文别名Edaravone Impurity 2; 4-(1-Sulfo-1-carboxylethyl) Edaravone; 2-(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)-2-sulfopropanoic acid; 4,5-Dihydro-alpha,3-dimethyl-5-oxo-1-phenyl-alpha-sulfo-1H-pyrazole-4-acetic acid; Edaravone Impurity III; Edaravone P1 Impurity; edaravone p1; Edaravone impurity 5; Edaravone-3