<unk>  is an opiate analogue that is an derivative of hydrocodone, where the 6-ketone group has been replaced by carboxymethyloxime. It has primarily antitussive effects and was found to have moderate potential to cause dependence in animal studies.
Codoxime
Obidoxime
Thiocarboxime
Fomepizole
Pralidoxime
Ethacridine lactate
Acetylcysteine 
Methylene blue