CCOc1ccc(OCC)c(NC(=O)C2CCN(S(=O)(=O)c3c(C)nc(O)nc3O)CC2)c1
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?