Cc1cc(C(=O)CSc2nnc(-c3ccco3)o2)c(C)n1CC1COc2ccccc2O1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?