Remdesivir N-21191237-80-5100 % similar Gs-4415241191237-69-066 % similar Remdesivir impurity21355357-49-157 % similar 2′,3′-O-Isopropylideneadenosine362-75-439 % similar Remdesivir1809249-37-339 % similar 7-Iodopyrrolo[2,1-f][1,2,4]triazin-4-amine1770840-43-132 % similar 7-Bromopyrrolo[2,1-f][1,2,4]triazin-4-amine937046-98-532 % similar 2',3'-O-(1-Methylethylidene)inosine2140-11-630 % similar 2'-C-Methyladenosine15397-12-330 % similar 6-Chloro-9-[2,3-O-(1-methylethylidene)-beta-D-ribofuranosyl]-9H-Purine39824-26-530 % similar