CC(C)(CN1CCC(Cc2ccccc2)CC1)NS(=O)(=O)c1ccccc1.O=C(O)C(=O)O
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?