title: Structure and synthesis of naturally occurring anhydrovitamin A2.
abstract: The structure of naturally occurring anhydrovitamin A2 was elucidated as 3-hydroxyanhydroretinol from study of its u.v.--visible, i.r., n.m.r. and mass spectra. The structure has been confirmed by a chemical synthesis. Saccobranchus fossils, a freshwater fish, can convert 3-hydroxyretinol into 3-hydroxyanhydroretinol, which in turn is converted into-3-dehydroretinol. Chemical conversion of 3-hydroxyretinol into 3-dehydroretinol was also carried out.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D005395:Fish Oils / Q000378:metabolism; D005399:Fishes / Q000378:metabolism*; D014801:Vitamin A / Q000031:analogs & derivatives* / Q000096:biosynthesis / Q000138:chemical synthesis
chemical_list: D005395:Fish Oils; D014801:Vitamin A; C019258:anhydrovitamin A(2)