CC(OC(=O)C1=COCCO1)C(=O)Nc1cc(S(=O)(=O)N2CCCCC2)ccc1Cl
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?