Figure 1.

Structure of fluorinated aromatic amino acids. 2-fluoro-L-phenylalanine (R2 = F, R3 = R4 = H); 3-fluoro-L-phenylalanine (R3 = F, R2 = R4 = H); 2-fluoro-L-tyrosine (R2 = F, R3 = H, R4 = OH), 3-fluoro-L-tyrosine (R3 = F, R2 = H, R4 = OH); 4-fluoro-L-phenylalanine (R2 = R3 = H, R4 = F).

Aerts et al. BMC Medical Physics 2008 8:4   doi:10.1186/1756-6649-8-4
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