NM 294

Formula : C27-H49-I-N-O6-P
CAS : 121269-43-0 

The I(125) cpd used for tumor visualization.

NM 324

Formula : C23-H41-I-N-O4-P
CAS : 144796-42-9 

The 125I form of NM 324 shows excellent tumor avidity and localization.