CC(C)(C)c1cc(NC(=O)c2cc3ccccc3s2)n(-c2ccc(OCC(=O)O)cc2)n1
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?