Due to the insolubility of the zwitterionic L-asparagine and L-alanine in ethanol, the amino acids were added in the form of an aqueous solution. After evaporation of the solvents and drying of the residue, quinine-derived QASs with either L-asparaginate or L-alaninate anion were obtained (Table ). In contrast to 1Br-4Br, which were white crystalline solids, the obtained QASs with the amino acid anions were amorphous solids with glassy appearance at room temperature. According to the results of DSC analyses, new compounds (4Br, 1Asp-4Asp, 1Ala-4Ala) did not exhibit first-or second-order phase transitions in the measurement range from -80 to 120 °C, although at temperatures exceeding 128 °C, the release of gaseous thermal decomposition products could be observed for QASs containing the amino acid anion. The exact results of the above-mentioned analyses are summarized in Table .2 (Supplementary Data).