Cc1cc(C(=O)CSc2nn3c(=O)c(C(C)(C)C)nnc3s2)c(C)n1C1CC1
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?