CN(Cc1ccccc1)C(=O)CCNS(=O)(=O)c1ccc2c(c1)oc(=O)n2C
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?