compound, radiopharmaceutical formulation, pharmaceutical composition, use of the compound, mixing, methods of collecting data for the diagnosis of an amyloid-associated disease or condition, determining the extent of amyloidogenic plaque burden in a tissue and / or body fluid, collecting data to determine a predisposition to an amyloid-associated disease or condition in a patient, to collect data to monitor a minimal residual disease in a patient following treatment with an antibody or vaccine composition, to collect data to predict a patient's ability to react. a patient being treated with an antibody or vaccine composition, and, test kit.