*3.3. NMR Analysis*

The 1D 1H NMR and 2D homo- and heteronuclear NMR (COSY, TOCSY, ROESY, HSQC, and HMBC) were acquired with the application of a Varian Unity Inova 500 spectrometer (500 MHz). Spectra were recorded in dimethyl sulfoxide-d6 (DMSO-d6). NMR data were processed and analyzed by TopSpin (Bruker, Billerica, MA, USA) and SPARKY software (3.114, Goddard and Kneller, freeware (https://www.cgl.ucsf.edu/home/sparky).
