CCc1ccc(CNC(=O)C2Cc3cc(S(=O)(=O)N4CCCCCC4)ccc3N2C(C)=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?