dihydroergocristine and its Impurities

Dihydroergocristine is used as the mesylate salt for the symptomatic treatment of mental deterioration associated with cerebrovascular insufficiency and in peripheral vascular disease. It is ergocristine in which a single bond replaces the double bond between positions 9 and 10. Reference standards of Dihydroergocristine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.