COc1ccc(-c2nc3ccc(NC(C)=O)cc3c(=O)n2Cc2ccccc2)cc1COc1ccc(NC(C)=O)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?