AIDS-139218 AIDS139218 Furazan-3-carboxyaldehyde, 4-methyl-, (phenylsulfonyl)hydra- zone, 2-oxide N'-((2-Hydroxy-4-methyl-1,2.lambda.~5~,5-oxadiazol-3-yl)methylene)benzenesulfonohydrazide NSC647715