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. Author manuscript; available in PMC: 2016 Nov 15.
Published in final edited form as: J Med Chem. 2015 Nov 9;58(22):8970–8984. doi: 10.1021/acs.jmedchem.5b01321

Table 3.

Effect of Constrained pTyr Surrogates on the Affinity of Xaa-Lys-Pro-Phe-NH2

Xaa IC50(µM)
5 Ac-pTyr graphic file with name nihms828572t1.jpg 6.1 ± 1.2
14 pCinn graphic file with name nihms828572t2.jpg 8.6 ± 2.8
15 p-Indole graphic file with name nihms828572t3.jpg 3.7 ± 0.052
16 p-Benzofuran graphic file with name nihms828572t4.jpg 89.6 ± 1.5