CN1CCN(C2=C(NS(=O)(=O)c3ccccc3)C(=O)c3ccccc3C2=O)CC1
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?