title: Anhydrous cholesterol: a new crystalline form in gallstones.
abstract: A new crystalline form of anhydrous cholesterol called cholesterol II has been found in gallstones. This material can change within a few weeks into the usual form of anhydrous cholesterol but pure synthetic cholesterol II is stable.
mesh_terms: D002769:Cholelithiasis / Q000378:metabolism*; D002784:Cholesterol / Q000032:analysis* / Q000096:biosynthesis / Q000138:chemical synthesis; D003460:Crystallization; D006801:Humans; D014961:X-Ray Diffraction
chemical_list: D002784:Cholesterol