Cc1cccc(NS(=O)(=O)c2cccc(C(=O)N3CCN(C/C=C/c4ccccc4)CC3)c2)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?