The spectra were processed in Mnova software (Mnova 15.0, Mestrelab Research, S. L., Spain). The automatic phasing and baseline correction using Whittaker smoother were applied. The zero-filling to 128k points and no apodization were used. The manually selected spectral regions marked in Fig. -3 were integrated in Mnova software using the "Sum" method. The results were compared with Magnetstein processing (see below).