Cc1ccc(Nc2nc(C(=O)N3CCC(C(=O)NCCN4CCOCC4)CC3)cs2)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?