Benzenesulfonamide, p-(pyruvoylazo)-, bis(amidinohydrazone) Guanidine, 1,1'-[[methyl[(p-sulfamoylphenyl)azo]ethanediylidene]dinitrilo]di- Hydrazinecarboximidamide, 2,2'-[1-[[4-(aminosulfonyl)phenyl]azo]-2-methyl-1,2-ethanediylidene]bis- NSC87438