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. 2021 Jan 20;12(9):3264–3269. doi: 10.1039/d0sc05071g

Fig. 2. 15N CPMAS spectra of vin, crystalline (Hvin+)·(Hoxa−) forms I and II and amorphous (Hvin+)·(Hoxa−). The signal shifts, affiliated with the proton transfer from H2oxa to vin, for the studied material are highlighted in blue. The 13C spectra are shown in Fig. S34 in the ESI† document.

Fig. 2