Preparation and characterization article 4 harmine 4 mass spectrometry 4 nuclear magnetic resonance spectroscopy 4 8-[10B]-dihydroxyborylharmine 2 Boron neutron capture therapy 2 [131I]-iodo-β-carbolines 2 amine oxidase (flavin containing) 2 beta carboline derivative 2 brain mapping 2 human 2 infrared spectrometry 2 iodination 2 neutron capture therapy 2 radioiodination 2 radiopharmaceutical agent 2 single photon emission computer tomography 2 synthesis 2