CC(=O)c1ccc(-c2cnc3c(NC=O)cc(-c4ccccc4Oc4ccccc4)cn23)cc1
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?