Cc1ccccc1-n1nc2c(c1NC(=O)c1cc3ccccc3oc1=O)CS(=O)(=O)C2
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?