COc1ccc(NC(=O)c2oc3ccccc3c2NC(=O)C23CC4CC(CC(C4)C2)C3)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?