CCN(c1ccccc1)S(=O)(=O)c1ccc2[nH]cc(C(=O)NCc3ccc(C)cc3)c(=O)c2c1
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?