Cc1nc2ccc(S(=O)(=O)NS(=O)(=O)c3ccc(-c4ccccc4)cc3)cc2c(=O)n1NS(=O)(=O)c1ccc(-c2ccccc2)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?