The invention provides methods for labeling vitamin B12 with 14C, 13C, tritium, and deuterium. When radioisotopes are used, the invention provides for methods of labeling B12 with high specific activity. The invention also provides labeled vitamin B12 compositions made in accordance with the invention.
|Patent number||US 8,202,507 B2|
|IPC||A6 IK5I/0,A6M 36/14|
|Publication status||Published - 19 Jun 2012|