2.2. Methods 1H-NMR measurements were recorded on a BRUKER AV III 300 MHz spectrometer (Brucker Austria GmbH, Vienna, Austria). As reference residual protonated solvents CDCl3: 7.26 ppm, DMSO-d6: 2.50 ppm and CD3OD: 3.31 ppm were used. The chemical shift is given in ppm. Gel permeation ...