“…45 The effects of non-covalent interaction of 3a and 3b with Ac-(S)-Ala-NHMe, Ac-(S)-Phe-NHMe (S)-4, and Ac-(S)-Phe-(S)-Ala-NHMe (S,S)-5 were investigated via NMR spectroscopy, and signal splitting was observed in 1 H, 19 F{ 1 H}, and 31 P{ 1 H} NMR (see Supporting Information). 45 The effects of non-covalent interaction of 3a and 3b with Ac-(S)-Ala-NHMe, Ac-(S)-Phe-NHMe (S)-4, and Ac-(S)-Phe-(S)-Ala-NHMe (S,S)-5 were investigated via NMR spectroscopy, and signal splitting was observed in 1 H, 19 F{ 1 H}, and 31 P{ 1 H} NMR (see Supporting Information).…”