Finally, for the most concentrated sample, the experimental band in the intermediate region shows a moderate increase in intensity compared to the previous concentration, but its shape remains mostly the same, with a slight enhancement on the low-frequency side. The Q/s method displays a significant increase in intensity, dominated by the tetramer-related band. Although the intensity is similar to the experiment, the band is narrower and overly centered on the tetramer. In contrast, the C/d method provides a simulated band that follows the experimental trend, showing an increase in intensity compared to the previous concentration. Regarding the shape, there is a change induced by the increased contribution of the tetramer, resulting in a band that aligns even more closely with the experimental data.