Iobenguane sulfate I-131
Iobenguane Sulfate I-131 is the sulfate salt form of iobenguane, an iodine-131 labeled aralkylguanidine norepinephrine analogue used as a diagnostic imaging tracer. Iobenguane is structurally related to guanethidine and norepinephrine. This agent, functioning as a false substrate of norepinephrine, is taken up and localized in the granules of pre-synaptic adrenergic neurons, thus making this compound useful for the imaging of neuroendocrine tissues and tumors.