1-(2,3-DIACETYL-5-TOSYL-Α-D-ARABINOFURANOSYL)-2-NITROIMIDAZOLE PRECURSOR FOR [18F]FAZA;1-(2,3-Diacetyl-5-tosyl-(-D-arabinofuranosyl)-2-nitroimidazole;1H-Imidazole, 1-[2,3-di-O-acetyl-5-O-[(4-methylphenyl)sulfonyl]-(-D-arabino-furanosyl]-2-nitro-;FAZA-Pre