IC₅₀ (nM) for parent compounds 2 and 3 and dye-labelled peptides 5 and 7. Studies for compounds 2 and 5 were performed on HEK293 cells transfected with GHSR-1a whereas parental PC-3 cells were used for studies using compounds 3 and .7.

Compound	IC50 (nM)
2	3.3
3	0.7
5	89.0
7	16.3