CC1CCCN(C(=O)CCS(=O)(=O)c2cc3c(cc2Cl)NC(=O)CO3)C1
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?