“…[ 11 C]methyl iodide is, of course, one of the most widely used reagents for labelling radiopharmaceuticals with carbon-11. Labelled methyl derivatives of estradiol, 92 proteinases, 93 thymine, 94 thiazols 95 and thiophene 96 have been prepared from [ 11 C]CH 3 I as well as labelled carfentanil, 97 vorozole, 98 zolpidem 99 and methylmetaraminol. 100 Even more complex biomolecules which are best referred to in code such as NS2495, 101 FK-506, 102 DAA1106, 103 NPS1506 104 or Ro15-4513 105 have all been labelled efficiently and quickly using [ 11 C]methyl iodide.…”