5-(2-(2,5-difluorophenyl)-1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione

5-(2-(2,5-difluorophenyl)-1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione product with CAS: 764667-66-5 is also known as 5-(2-(2,5-difluorophenyl)-1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione. This product can be used as a working standard or secondary reference standard. Additional internal validation as per respective FDA regulations/guidelines may require. 5-(2-(2,5-difluorophenyl)-1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione is generally used for Quality Control (QC), Quality Assurance (QA) during commercial production of Sitagliptin and its related formulations. Moreover, 5-(2-(2,5-difluorophenyl)-1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione is also used in the process of Abbreviated New Drug Application (ANDA) filing to FDA and toxicity study of respective drug formulation.