Cc1ccc(Cc2cnc(NC(=O)c3ccc4c(c3)CC(c3ccccc3)OC4=O)s2)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?