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- W2052559991 abstract "[N-Methyl-11C]choline has been synthesized at room temperature by the reaction of [11C]CH3I with 2-dimethylaminoethanol (DMAE), with the latter directly loaded on a weak cation-exchange cartridge. Most of the efforts have been directed to reduce the amount of residual precursor in the product's final solution in order to make this tracer more suitable to brain studies. In the process, radiochemical yields and residual DMAE have been placed in relation with both the starting amount of precursor and the rinsing conditions used and compared with the more ‘traditional’ loading of the precursor on either a C18 cartridge or a loop. Comments and indications on the most convenient analytical technique and conditions for quantitative analysis, with particular emphasis on the precursor, are also reported. Under what we believe to be a fair compromise, [11C]CH3I incorporation yields of ca. 90% were easily achieved with a residual amount of starting material in the 8- to 12-ppm range. Copyright © 2010 John Wiley & Sons, Ltd." @default.
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- W2052559991 date "2010-11-30" @default.
- W2052559991 modified "2023-09-27" @default.
- W2052559991 title "[N-Methyl-11C]choline by on-column reaction: a study on [11C]CH3I incorporation and the residual amount of precursor in the product" @default.
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- W2052559991 doi "https://doi.org/10.1002/jlcr.1838" @default.
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