NC(=O)COc1ccc(C2c3c(oc4ccccc4c3=O)C(=O)N2CC2CCCO2)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?