CCOC(=O)c1c(NC(=O)C(C)N2CCN(S(=O)(=O)c3cccs3)CC2)sc2c1CCC(C)C2
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?