Cc1ccc2c(c1)C(=O)OC(C(=O)Nc1ncc(Cc3ccccc3)s1)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?