依达拉奉杂质   Edaravone impurity

YDF-A  3,3'-dimethyl-1,1'-diphenyl-1H,1'H-[4,4'bipyrazole]-5,5'-diol  177415-76-8 醇式   (7477-67-0酮式）

YDF-B  3,3'',5'-trimethyl-1,1'',2'-triphenyl1H,1''H-[4,4':4',4''-terpyrazole]3',5,5''(2'H,4H,4''H)-trione  124009-63-8 醇式 （68195-63-1 酮式)

YDF-P1  4-(1-Sulfo-1-carboxylethyl) Edaravone;edaravone p1  1357477-99-6

YDF-P3  2-(5-hydroxy-3-methyl-1-phenyl-1Hpyrazol-4-yl)propane-2sulfonic acid  1323485-71-7