CCCCOC(=O)c1c(C)oc2ccc(NS(=O)(=O)c3ccc4c5c(cccc35)C(=O)N4)cc12
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?