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. 2020 Oct 8;10:16771. doi: 10.1038/s41598-020-73681-1

Table 1.

The binding affinity assay of compounds 24, 25, 26, 27, 28 and morphine on MOR.

[3H]diprenorphine binding, Ki (nM)
Morphine 6 ± 1.0
ME 3.5 ± 0.8
24 830 ± 50.0
25 625 ± 79.0
26 535 ± 50.0
27 720 ± 95.0
28 965 ± 110.0

[Met5] Enkephalin (ME) is an opioid pentapeptide.