2-Hydroxy-2-methylbutanenitrile 2-Hydroxy-2-methylbutyronitrile 4111-08-4 73683-34-8 Butanenitrile, 2-hydroxy-2-methyl- Butanone cyanohydrin Butyronitrile, 2-hydroxy-2-methyl- EINECS 223-892-5 Ethyl methyl ketone cyanohydrin Methyl ethyl cyanohydrin Methyl ethyl ketone cyanohydrin NSC 44232