CCOC(=O)c1ccc(N2C(=O)c3[nH]nc(-c4ccco4)c3C2c2ccc(OCC)cc2)cc1
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?