5O4Y:
reference: Bioactive macrocyclic inhibitors of the PD-1/PD-L1 immune checkpoint., Magiera-Mularz K, Skalniak L, Zak KM, Musielak B, Rudzinska-Szostak E, Berlicki L, Kocik J, Grudnik P, Sala D, Zizigas-Zarganis T, Shaabani S, Domling A, Dubin G, Holak TA, Angew Chem Int Ed Engl. 2017 Sep 7. doi: 10.1002/anie.201707707. PMID: 28881104

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