| abstract |
A diagnostic agent for pancreatic exocrine function comprising a dipeptide represented by the following formula (I): n nX 1 —R 1 —Y ‘ (I) nor a pharmaceutically acceptable salt thereof, n wherein X 1 is a protecting group, R 1 is a phenylalanine, glutamine, valine, tyrosine, methionine, serine or threonine residue, and Y1 is a 13 C-labeled alanine molecule optionally having a protecting group. |