2-Butanone, cyanohydrin 2-Hydroxy-2-methylbutyronitrile 4111-08-4 Butanenitrile, 2-hydroxy-2-methyl- Butanone cyanohydrin Butyronitrile, 2-hydroxy-2-methyl- Ethyl methyl ketone cyanohydrin Methyl ethyl cyanohydrin Methyl ethyl ketone cyanohydrin NSC44232