CC1Cc2cc(C(=O)C3=C(O)C(=O)N(CCN4CCOCC4)C3c3ccc(C(C)C)cc3)ccc2O1
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?