Cc1ccc(SCC(=O)Nc2ccc(O)c(-c3nc4cc(C)ccc4o3)c2)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?