Provide the starting molecule and the reagent needed to synthesize the cyanohydrin below.

Reaction showing synthesis of cyanohydrin from a compound using NaCN and HCN.

Reaction showing conversion of cyanohydrin using H2O and HCl.

Reaction showing synthesis of cyanohydrin from a carbonyl compound using NaCN and HCN.

Reaction showing conversion of cyanohydrin using H2O and HCN from an amine compound.