CCOC(=O)c1cccc(NC(=O)CN(c2ccc(C)cc2)S(=O)(=O)c2c(C)noc2C)c1
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?