abstract |
The compounds of formulas (I) and (II) are radiopharmaceuticals that bind to the CCR1 receptor and are able to pass through the blood-brain barrier, and are therefore useful in diagnosing Alzheimer's disease, preferably at an early stage of the disease,wherein X<1>, X<2>, R<1>, R<2>, R<3>, R<4 >and R<5 >are as defined herein. |