Synonyms: Pyridinium,2,4'-diformyl-1,1'-(oxydimethylene)di-, dichloride, dioxime (8CI); Pyridinium,2-[(hydroxyimino)methyl]-1-[[[4-[(hydroxyimino)methyl]pyridinio]methoxy]methyl]-,dichloride (9CI); 2-(Hydroxyiminomethyl)-1-pyridiniummethyl4-hydroxyiminomethyl-1-pyridiniummethyl ether dichloride; HS 3; HS 3(pharmaceutical)