CCCCN(C(=O)NC(=O)NC12CC3CC(CC(C3)C1)C2)S(C)(=O)=O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?