<unk>  is an isomer of sorbitol, another sugar alcohol; the two differ only in the orientation of the hydroxyl group on carbon 2. While similar, the two sugar alcohols have very different sources in nature, melting points, and uses.
Mannitol
Paricalcitol
Rehydration
Balanced salt solution
Galantamine
Geritol
Krebs–Henseleit solution
Osmotherapy