abstract |
The present invention relates to (11β,17α)-11-(4-(2- 11 C-acetyl)phenyl)-17,23- epoxy-19,24-dinorchola-4,9,20-trien-3-one, an 11 C-labelled ORG 33628; a process for the preparation thereof, intermediates used in this process and the use of this compound as a PET tracer for the detection of breast cancer. |