摘要 |
<p>The invention relates to compounds of formula (I); wherein R<SUP>1 </SUP>and R<SUP>2 </SUP>independently selected from C<SUB>1-6 </SUB>alkyl; P<SUP>1</SUP>, P<SUP>2</SUP>, P<SUP>3</SUP>, and P<SUP>4 </SUP>are each independently hydrogen or a protecting group; and their use in the preparation of <SUP>18</SUP>F-labelled 6-L-fluorodopa</p> |