Cc1nc(C(N)=S)sc1/C(CC(=O)C(=O)Nc1cccc2ccc(O)cc12)=N\NC(=O)c1ccncc1
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?