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. Author manuscript; available in PMC: 2014 Sep 18.
Published in final edited form as: Eur J Nucl Med Mol Imaging. 2007 May 5;34(11):1823–1831. doi: 10.1007/s00259-007-0427-0

Fig. 1.

Fig. 1

Chemical structures of 18F-FRGD2 (a) and 18F-FPRGD2 (b). The only difference between the two structures is the mini-PEG spacer