butan-2-one + hydrogen cyanide => (2R)-2-hydroxy-2-methylbutanenitrile
butan-2-one + hydrogen cyanide => (2r)-2-hydroxy-2-methylbutanenitrile
butan-2-one + hydrogen cyanide => (2R)-2-hydroxy-2-methylbutanenitrile
butan-2-one + hydrogen cyanide => (2r)-2-hydroxy-2-methylbutanenitrile