Cc1ccc(C)c(N2CCN(C(=O)c3nn(C)c4c3CS(=O)(=O)c3ccccc3-4)CC2)c1
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?