Cc1cc(C)cc(NC(=O)C(NCCN2CCOCC2)c2ccccc2)c1.O=C(O)C(=O)O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?