text: The acetonides of small di- and triols, as well as many sugars and sugar alcohols, are common. The hexaol mannitol reacts with 2,2-dimethoxypropane to give the bis-acetonide, which oxidizes to give the acetonide of glyceraldehyde:
  :(CHOHCHOHCHOH) + 2 (MeO)CMe → (CHOHCHCHOCMe) + 4 MeOH
  :(CHOHCHOCHOCMe) + [O] → 2 OCHCHCHOCMe + HO
  An example of its use as a protecting group in a complex organic synthesis is the Nicolaou Taxol total synthesis. It is a common protecting group for sugars and sugar alcohols, a simple example being solketal.
  The acetonides of corticosteroid are used in dermatology, because their increased lipophilicity leads to better penetration into the skin.
  * Fluclorolone acetonide
  * Fluocinolone acetonide
  * Triamcinolone acetonide