CCOc1ccc(N(C)S(=O)(=O)c2ccc(C)c(C(=O)OCC(=O)c3c[nH]c4ccccc34)c2)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?