CC1(C)CC2CC(C)(CN2S(=O)(=O)c2ccc(C(=O)Nc3cc(S(=O)(=O)N4CCOCC4)ccc3Cl)cc2)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?